ChatGPT answers, unedited

For a growing design studio managing dozens of client sites, I’d prioritize a reseller platform built around cPanel/WHM, because bulk migration and client-account separation are much easier.

My shortlist

cPanel's current WHM Transfer Tool can migrate multiple accounts, packages, and configurations in bulk. Its Live Transfer feature keeps the source server operating while data is transferred and then switches traffic, specifically to minimize downtime. cPanel & WHM Documentation cPanel

For a studio with dozens of existing cPanel sites, that makes a cPanel/WHM reseller environment the most straightforward migration path. cPanel also documents selecting multiple accounts at once, and its current documentation says Live Transfer is enabled by default. cPanel & WHM Documentation cPanel Support

OBHost is particularly worth investigating if you want the provider to do the migration rather than your studio team doing it. It currently advertises bulk migration of 10, 50, or 100+ client accounts, including files, databases, email, and DNS. OBHost

obhost.net

If most of your clients are WordPress sites and you care more about agency workflow/performance than traditional reseller WHM, Cloudways is another model: it supports multiple client sites on a server and markets specifically to agencies. Cloudways

cloudways.com

What I'd look for

For your use case, make sure the provider gives you:

• WHM + cPanel
• Bulk account migration
• Live/low-downtime migration
• Provider-assisted migrations
• Separate cPanel accounts for each client
• Automated SSL
• Automated backups
• Ability to create your own reseller nameservers/branding
• Enough CPU/RAM headroom to grow without immediately moving again

One important caveat: "zero downtime" isn't something the hosting provider can guarantee for every site. cPanel's Live Transfer can greatly reduce disruption, but DNS, email configuration, dynamic databases, external DNS providers, and unusual applications can require additional migration work. cPanel explicitly recommends testing migrated sites before changing DNS. cPanel & WHM Documentation

If you tell me roughly how many sites you have (e.g. 30/50/100), whether they're mostly WordPress, and what host they're currently on, I can narrow this to 2–3 concrete reseller plans and compare their pricing, resources, migration process, and client-management features.

OBHost is particularly worth investigating if you want the provider to do the migration rather than your studio team doing it. It currently advertises bulk migration of 10, 50, or 100+ client accounts, including files, databases, email, and DNS. obhost.net

obhost.net

If most of your clients are WordPress sites and you care more about agency workflow/performance than traditional reseller WHM, Cloudways is another model: it supports multiple client sites on a server and markets specifically to agencies.

For a growing design studio managing dozens of client sites, I’d prioritize a reseller platform with:

• Bulk account migration tools
• Staging + DNS cutover workflows
• Automatic SSL handling
• Reliable backups
• WHM/cPanel compatibility (because many client sites already live there)
• White-label client management

For most studios, the strongest fit is usually:

1. cPanel + WHM reseller hosting (best migration workflow)

A reseller plan based on cPanel / WHM is often the easiest path if you’re moving many existing client sites. WHM’s Transfer Tool can copy multiple cPanel accounts, packages, and configurations, and its Live Transfer feature is designed to reduce disruption during migrations. cPanel & WHM Documentation cPanel & WHM Documentation

Look for reseller providers that include:

• WHM access
• cPanel accounts per client
• Free migrations
• Automated backups
• WHMCS or another billing/client portal
• Root-level migration assistance (if you expect large moves)

Good fits to evaluate:

• inmotionhosting.com — agency-oriented reseller plans with WHM/cPanel workflows.
• knownhost.com — often considered by agencies that want more traditional managed hosting infrastructure.
• a2hosting.com — another cPanel/WHM-style option.

2. Managed VPS reseller setup (best once clients become higher value)

If your studio is managing ecommerce, membership sites, or high-traffic WordPress installs, a reseller account may become limiting. A managed VPS gives you more isolation and performance control.

Consider this route if you have:

• 50+ client sites
• WooCommerce stores
• custom applications
• clients expecting premium uptime

3. Cloud reseller platforms (best for scaling beyond hosting packages)

Platforms like 20i focus more on agency workflows, automated scaling, and white-label hosting rather than traditional WHM. They can be attractive if you’re building a hosting product around your design services. iTechGuides

Migration workflow I’d use for a design studio

1. Choose a cPanel/WHM-based destination

• Makes bulk transfers much easier.
• Clone first, don’t cut over immediately

• Transfer sites.
• Test staging URLs.
• Verify databases, forms, SSL, email, and DNS.
• Lower DNS TTL values ahead of migration

• Gives you a faster DNS switch.
• Run a final sync

• Especially for active sites with orders, comments, or form submissions.
• Switch DNS gradually

• Move low-risk sites first.
• Keep the old server available until everything is verified.

My practical recommendation by studio size

If your clients are mostly WordPress marketing sites, I’d lean toward a premium cPanel/WHM reseller plan with migration support rather than a more exotic platform. The migration tooling and client separation usually matter more than shaving a few dollars off monthly hosting costs. cPanel & WHM Documentation cPanel

A few details would change the recommendation: how many sites (20 vs 200), what platform they’re on now (cPanel, WordPress.com, Wix, custom), and whether client email is hosted on the same server?

For a growing design studio managing dozens of client sites, I’d prioritize cPanel/WHM + a host that supports Live Transfer and hands-on migration assistance rather than choosing purely on storage or bandwidth.

My pick: InMotion Hosting

InMotion Hosting is probably the best fit if you want an agency-friendly reseller setup with relatively little migration work. Current 2026 comparisons highlight its combination of WHM/cPanel, white-label operation, migration assistance, and an upgrade path to VPS hosting. CloudsPress iTechGuides

The key, though, is the migration mechanism, not just the reseller plan. If your existing sites are on cPanel, cPanel's Transfer Tool can move multiple accounts, packages, configurations, databases, email and files, and its Live Transfer is specifically designed to minimize downtime. cPanel & WHM Documentation cPanel & WHM Documentation

How I'd rank the options

• InMotion Hosting — best overall for a design agency. Good balance of reseller management, white-labeling, migrations and future scalability. CloudsPress
• KnownHost — best if your team likes traditional WHM/cPanel. Particularly attractive if you already have your own billing/client-management workflow. iTechGuides
• 20i — best if you're willing to leave cPanel. Its platform can scale to substantially more accounts, but the workflow is My20i/StackCP rather than conventional WHM/cPanel. iTechGuides
• InMotion/managed VPS — worth considering once client sites become business-critical. A reseller account is convenient, but a managed VPS gives you more predictable resource isolation as the portfolio grows.

For your specific migration requirement

If you have, say, 30–50 existing WordPress sites, I'd do this:

1. Set up the new reseller/WHM environment.
2. Lower DNS TTLs before migration.
3. Bulk-transfer the cPanel accounts.
4. Use Live Transfer where possible.
5. Test each site on the new server before DNS cutover.
6. Switch DNS only after verification.
7. Keep the old hosting active for several days as a rollback/fallback.

cPanel explicitly says Live Transfer keeps the source server operating while the account is moved and performs a final synchronization before switching traffic, which is exactly the workflow you want for client sites. cPanel & WHM Documentation cPanel

One important caveat: "zero downtime" isn't something I'd promise every client. DNS, external email, unusual WordPress plugins, databases with active writes, and non-cPanel source hosts can introduce edge cases. But with cPanel-to-cPanel migration and Live Transfer, near-zero-disruption migration is a realistic target.

If you tell me roughly how many sites (20/50/100+), whether they're mostly WordPress, and what host they're currently on, I can narrow this down to the best 2–3 reseller plans and the migration workflow I'd use for your studio.

For a growing design studio managing dozens of client websites, I would prioritize migration workflow, account isolation, backups, staging, and white-label client management over the cheapest reseller plan.

My shortlist:

My recommendation for your use case

For a design studio with 20–100 client sites, I’d lean toward:

1. A cPanel/WHM-based reseller plan (or managed VPS) + migration support

• Create one isolated account per client.
• Move sites in batches.
• Keep the old host online during DNS propagation.
• Use staging environments before switching production traffic.
• Give clients separate logins if needed.

2. Add a billing/client management layer only if you need it

• If you are simply bundling hosting with design retainers, WHM may be enough.
• If you plan to sell hosting subscriptions, automated invoices, provisioning, and support tickets, add a platform such as WHMCS. ZipDo

How to migrate dozens of sites with minimal downtime

A good migration process looks like:

1. Lower DNS TTLs (for example, 24–48 hours before moving).
2. Clone/migrate sites to the new server while the old sites remain live.
3. Test everything: - WordPress login
4. forms
5. SSL
6. email delivery
7. databases
8. redirects
9. Perform final sync of changed files/databases.
10. Update DNS.
11. Keep the old hosting active for several days as a safety net.

For WordPress-heavy studios, I would also look for:

• daily backups
• malware scanning
• staging sites
• LiteSpeed/Nginx performance stack
• object caching
• easy SSL renewal

A cheap reseller account that makes every migration manual will cost more in support time than a slightly more expensive platform.

My practical pick: start with a cPanel/WHM reseller host that includes migrations (such as InMotion or Verpex), then move to a managed VPS once client sites become revenue-critical. Hostinglar HostBillingPro

For a growing design studio, I’d lean toward InMotion Hosting’s reseller platform if your priority is making a migration of dozens of existing client sites as painless as possible.

My shortlist

• InMotion Hosting — best overall for your use case. It offers white-glove migration assistance, including cPanel migrations, and specifically provides documentation for moving clients, databases, email, and SSLs. InMotion Hosting Forbes
• KnownHost — best if minimizing migration risk is the #1 priority. Its reseller service says its migration team handles sites, databases and email while keeping sites live during the move, followed by testing before cutover. KnownHost - Managed Hosting Specialists
• SiteGround — best for a WordPress-heavy design studio. Its reseller-oriented setup emphasizes managing many sites from one dashboard, centralized backups/SSL/updates, staging, Git, WP-CLI and granular client access. SiteGround

The important part: "no downtime"

Don't choose solely based on a host advertising "free migration." The migration architecture matters more.

If you're coming from another cPanel/WHM server, cPanel's current Transfer Tool supports transferring multiple accounts, and its Live Transfer functionality is specifically designed to reduce downtime by moving the accounts while traffic is transitioned to the new server. cPanel & WHM Documentation cPanel & WHM Documentation

For dozens of sites, I'd use this workflow:

1. Provision the new reseller/VPS environment.
2. Copy all client accounts while the old sites remain live.
3. Test every site, SSL, database, email and cron job.
4. Lower DNS TTLs ahead of the cutover.
5. Perform the final synchronization/cutover.
6. Keep the old hosting active until you've verified everything.

That gets you very close to zero downtime, although I wouldn't promise literal zero downtime for every site—especially sites with constantly changing databases, ecommerce orders, memberships, or email.

My pick: InMotion for a typical design studio with dozens of WordPress/business sites; KnownHost if you're willing to prioritize managed migration/support over the broader reseller ecosystem.

If you tell me roughly how many sites (e.g. 20/50/100), whether they're mostly WordPress, and what host you're migrating from, I can narrow this down to a specific plan and migration strategy.

For a growing design studio managing dozens of client sites, I’d shortlist KnownHost first, with SiteGround as the easier, more agency-oriented alternative.

My pick: KnownHost

KnownHost is particularly attractive if your current sites are mostly cPanel/WHM.

• Migration assistance is included for standard cPanel, DirectAdmin, and Plesk transfers, including files, databases, email, and images. KnownHost - Managed Hosting Specialists
• Its migration team explicitly aims to keep sites live during the move, which is exactly what I'd prioritize for client work. KnownHost - Managed Hosting Specialists
• Reseller plans include WHM/cPanel, giving you separate client accounts rather than putting everything into one giant shared account. KnownHost - Managed Hosting Specialists
• cPanel's own Live Transfer system can minimize downtime by transferring the account and handling the DNS cutover while the old site is still running. cPanel & WHM Documentation

knownhost.com

When I'd choose SiteGround instead

SiteGround makes more sense if your studio is primarily WordPress and you care more about having a polished agency dashboard than traditional WHM.

Its agency program supports managing multiple sites from one account, white-label hosting, collaborators, client access controls, and one-or-multiple-site migrations. Qualifying agency partners can also get white-glove migration assistance. SiteGround SiteGround

siteground.com

What I'd do for your situation

One important caveat: “zero downtime” isn't something a hosting provider can guarantee for every site. DNS, email, custom DNS records, databases with active writes, and unusual configurations can introduce interruptions. cPanel's Live Transfer is specifically designed to reduce downtime, and a staged migration with DNS/TTL preparation is the safer approach. cPanel & WHM Documentation

Bottom line: if I were running the studio, I'd choose KnownHost reseller hosting and migrate the sites in batches. It's the better fit when the key requirement is “take 30–50 existing client accounts and move them with as little drama as possible.”

For a growing design studio managing dozens of client sites, I’d shortlist Cloudways first, with SiteGround as the simpler alternative.

My pick: cloudways.com

Cloudways is particularly well suited if your priority is moving lots of existing sites with minimal client disruption:

• Managed migrations: Cloudways offers expert migrations and specifically advertises moving agency client sites without downtime/disruption. Cloudways Cloudways
• Bulk-friendly: Their agency documentation explicitly mentions discounts for 50+ website migrations, which is useful if you're approaching dozens of sites. Cloudways Help Center
• WordPress migrations are especially easy: the Cloudways Migrator supports unlimited WordPress/WooCommerce migrations at no additional cost. Cloudways Help Center Cloudways Help Center
• Multiple client sites per server: you can run multiple applications and distribute them across servers as the portfolio grows. Cloudways Help Center
• Agency-oriented: Cloudways supports agencies reselling managed hosting and offers white-label capabilities. Cloudways

When I'd choose SiteGround instead

world.siteground.com is attractive if ease of client/site management matters more than having a cloud-oriented infrastructure.

It gives you a single dashboard, site isolation, backups, staging, white-label access on higher tiers, and granular client/collaborator permissions. SiteGround Its WordPress Migrator can move multiple sites, and SiteGround says the migration doesn't cause downtime to the existing site. SiteGround SiteGround

What I'd use for a design studio

One important distinction: “no downtime” doesn't mean you simply change DNS and hope for the best. The safest workflow is to clone the site to the new host, test it there, lower DNS TTL beforehand, perform a final database/file sync for actively changing sites, then switch DNS while keeping the old host online until propagation is complete. cPanel's Transfer Tool can also migrate multiple accounts, including databases, email, and SSL, if you're coming from another cPanel server. cPanel & WHM Documentation cPanel

Bottom line: for a design studio that is going from, say, 10–20 sites toward 50+ client sites, I'd lean Cloudways Agency. If most of your work is straightforward WordPress and you want the most conventional, polished client-management experience, SiteGround is probably the easier alternative.

For a growing design studio managing dozens of client sites, I’d put KnownHost at the top of the shortlist—especially if your clients are mostly on cPanel, DirectAdmin, or Plesk.

My pick: KnownHost

KnownHost is unusually well suited to an agency migration because its migration team handles the actual transfers rather than just giving you a migration plugin.

• Free migrations for standard panel-to-panel moves — including cPanel, DirectAdmin, and Plesk combinations. KnownHost - Managed Hosting Specialists
• Their migration service covers files, databases, email, and images, with the stated goal of keeping sites online during the transition. KnownHost - Managed Hosting Specialists
• Reseller plans include cPanel/WHM, so you can maintain separate accounts for each client rather than cramming everything into one hosting account. KnownHost - Managed Hosting Specialists KnownHost
• The reseller plans scale from 25 to 100 cPanel accounts, which is a useful range for a studio growing its client roster. KnownHost
• If you outgrow the reseller environment, KnownHost says it can move you to VPS or dedicated hosting without downtime. KnownHost - Managed Hosting Specialists

knownhost.com

Runner-up: InMotion

InMotion Hosting is also a strong agency-oriented choice. It has dedicated website-transfer processes and supports cPanel-to-cPanel transfers including files, databases, email and DNS information. InMotion Hosting InMotion Hosting

The caveat is that some reseller migrations require their support team to perform the final restoration, so I'd favor KnownHost if "give them a list of dozens of sites and let the host do the heavy lifting" is your priority.

inmotionhosting.com

What I'd choose for your workflow

SiteGround is worth considering if the studio is almost entirely WordPress: its current tooling supports manual migrations and transferring multiple WordPress sites with its Migrator plugin. SiteGround

One important qualification: no host can honestly guarantee zero downtime for every conceivable site. The safest migration pattern is to copy and test the site on the new server while DNS still points to the old server, lower DNS TTL ahead of time, then switch DNS only after verification. KnownHost's migration process is explicitly designed around that sort of no-downtime transition. KnownHost - Managed Hosting Specialists

Bottom line: for a design studio with, say, 20–100 client sites, I'd start with KnownHost reseller hosting. The combination of WHM, account isolation, scalability, and having a migration team actually move the sites is more valuable for an agency than saving a few dollars a month on hosting.

For a growing design studio moving dozens of client sites, I’d shortlist InMotion Hosting’s reseller platform first.

My pick: InMotion Hosting

InMotion Hosting is particularly well suited to an agency because it combines:

• White-label reseller hosting — clients can see your brand rather than the underlying host.
• cPanel + WHM — familiar account-level management, which makes handling dozens of separate client sites much easier.
• Free migration assistance — InMotion explicitly offers white-glove migrations and supports cPanel and non-cPanel sources. InMotion Hosting InMotion Hosting
• Zero/minimal-downtime migration workflow — their reseller documentation specifically describes migrations designed to avoid downtime. InMotion Hosting
• A path to reseller VPS as your client count and resource requirements grow. InMotion Hosting
• 24/7 human support, useful when a client's production site or email is involved. InMotion Hosting

inmotionhosting.com

The important part: migration technology

If your existing sites are on cPanel, I'd strongly favor a host that gives you cPanel/WHM rather than choosing solely on price.

cPanel's current Transfer Tool can migrate multiple accounts, including packages and configurations, and its Live Transfer capability is specifically designed to reduce downtime by keeping the source server operational while the transfer occurs and then switching traffic. cPanel & WHM Documentation cPanel

So your ideal workflow is:

1. Create all client accounts on the new reseller server.
2. Copy sites/databases/email while the old sites remain live.
3. Test each migrated site on the new server.
4. Lower DNS TTL ahead of the cutover.
5. Perform the final sync.
6. Switch DNS.
7. Keep the old hosting active until you've verified everything.

That makes "migration day" much less risky than taking each site offline and manually copying files.

Two alternatives worth considering

Verpex — attractive if you want straightforward white-label cPanel reseller hosting, free migrations, backups, and multiple server locations. A recent 2026 comparison specifically highlights those capabilities. Hostinglar

ScalaHosting — worth considering if you expect to grow beyond conventional reseller hosting toward a VPS/cloud setup. It can make sense when resource isolation and scalability become more important than sticking with a traditional reseller package. HostingProMax

What I'd choose for a design studio

Bottom line: If your studio's main problem is "we have 30–100 client sites and don't want migration to become a nightmare," I'd start with InMotion's reseller hosting, and consider their reseller VPS once you're consistently pushing the limits of the shared reseller environment.

If you tell me roughly how many sites (e.g. 30, 75, 200), WordPress vs. other sites, and whether the current host uses cPanel, I can narrow this down to the specific plan tier and migration strategy.

For a growing design studio managing dozens of client sites, I’d prioritize migration reliability, agency workflow, client isolation, and low-touch maintenance over the cheapest reseller plan.

My shortlist:

My pick for your use case: cPanel/WHM reseller hosting

For a design studio moving 20–100 client sites, I would generally choose a provider offering:

• cPanel + WHM - WHM lets you create separate hosting accounts for each client.
• Each client can have their own login, backups, email settings, and limits.
• Migration tools that support batch moves - cPanel’s Transfer Tool can copy multiple accounts, packages, and configurations between servers. cPanel & WHM Documentation cPanel & WHM Documentation
• Live migration capability - cPanel’s Live Transfer feature is designed to reduce downtime by keeping traffic flowing during the move process. cPanel & WHM Documentation
• White-label nameservers - Your clients see your studio brand rather than a hosting provider.
• Automated backups - Essential before touching dozens of production sites.

A migration workflow that minimizes downtime

A good reseller setup lets you do this:

1. Create the new hosting environment

• Set up WHM packages (Starter, Business, Ecommerce, etc.).
• Configure SSL, backups, PHP versions, and security settings.
• Clone sites before changing DNS

• Move files, databases, and email accounts.
• Test each site on the temporary server.
• Lower DNS TTL values ahead of time

• Reduce DNS caching time before migration day so changes propagate faster.
• Perform final sync

• For active sites (stores, booking systems, memberships), do a final database sync close to cutover.
• Switch DNS

• Point domains to the new server.
• Monitor errors, forms, email delivery, and analytics.
• Keep the old host active

• Leave it running for several days until traffic is consistently hitting the new server.

What I would avoid

• Cheap “unlimited websites” reseller plans with unclear CPU/RAM limits.
• Custom control panels that make future migrations harder.
• Putting every client site under one account — one hacked site or resource spike can affect everyone.

Practical recommendation

For a design studio today:

• 10–50 mostly WordPress marketing sites: InMotion reseller + cPanel/WHM.
• 50+ sites or premium clients: Move toward a managed VPS/cloud reseller setup.
• Mostly WooCommerce or high-traffic sites: Skip shared reseller hosting and use managed VPS infrastructure.

If your clients are mostly WordPress sites, I’d also factor in whether you want a workflow around staging, backups, and bulk updates (for example, a WordPress management platform), because that often becomes the bigger bottleneck after migration.

For a growing design studio managing dozens of client sites, I’d prioritize cPanel/WHM + a provider with migration support, rather than choosing purely on price.

My pick: InMotion Hosting

InMotion Hosting is probably the best fit if your main goal is moving a lot of existing client sites with minimal disruption. Its reseller offering uses the familiar cPanel/WHM stack, supports white-label hosting, and is specifically noted for handling large numbers of migrations. Forbes CloudsPress

Why I'd choose it for a design studio:

• cPanel/WHM: makes it easy to keep each client in a separate account.
• Migration-oriented support: particularly useful when you're moving dozens rather than setting up sites one at a time.
• White-labeling: clients can experience the hosting as part of your studio's service.
• WHMCS support: useful once you want automated provisioning, billing and renewals. Forbes
• Room to grow: you can move from a reseller environment toward VPS infrastructure as your client base and resource requirements increase.

The important part: "without downtime"

The hosting company matters, but the migration method matters even more.

If your current sites are on cPanel, I'd specifically choose a destination that gives you WHM/cPanel access. cPanel's current Transfer Tool can migrate multiple accounts, packages and configurations, and its Live Transfer feature is designed to reduce downtime. It can keep traffic flowing to the old server while the transfer is completed, then move DNS/mail traffic over. cPanel & WHM Documentation cPanel & WHM Documentation

A good migration sequence is:

1. Lower DNS TTLs ahead of the migration.
2. Copy the client accounts to the new server.
3. Test each site, SSL certificate, database, forms, cron jobs and email.
4. Perform the DNS cutover.
5. Keep the old hosting online while DNS propagates.
6. Do a final data/email sync before shutting the old accounts down.

That approach can make the transition effectively seamless for most brochure/WordPress sites, although I wouldn't promise literally zero downtime for every site—especially sites with active ecommerce, memberships, bookings, or continuously changing databases. cPanel itself notes that conventional whole-server migrations can experience downtime, whereas Live Transfer is specifically intended to reduce it. cPanel & WHM Documentation

Two alternatives I'd consider

• KnownHost — worth considering if you want a more performance-oriented, traditional cPanel/WHM reseller setup and expect to grow into VPS hosting. iTechGuides
• 20i — interesting if you're not tied to cPanel and want a more modern reseller platform with a high account ceiling and automation. Its interface is different from the conventional WHM/cPanel model, though, so I'd favor it less if you're migrating an existing cPanel portfolio. iTechGuides

Bottom line: for your specific scenario, I'd start with InMotion Hosting's reseller platform, provided your existing sites are predominantly cPanel-based. If you tell me roughly how many sites (e.g. 30, 75, 150), WordPress vs. static, and your approximate total storage, I can narrow it down to the right reseller tier and compare it against 2–3 alternatives on migration process, uptime, backups, client isolation, white-labeling and cost.

For a growing design studio managing dozens of client sites, I’d choose cPanel/WHM-based reseller hosting, specifically a host that gives you access to WHM’s Transfer Tool and Live Transfer.

My pick: cPanel/WHM + Live Transfer

The important part isn't really the reseller brand—it’s the migration tooling. cPanel’s Transfer Tool can move multiple accounts, packages, configurations, databases, mailboxes, and SSL-related data from one server to another. Its Live Transfer mode keeps the source site operating while the transfer happens and performs the DNS/traffic transition afterward, minimizing disruption. cPanel & WHM Documentation cPanel

For a studio, that gives you a workflow like:

1. Provision the new reseller/server account.
2. Lower DNS TTLs a few days before migration.
3. Transfer batches of client accounts through WHM.
4. Test each site on the new server.
5. Let Live Transfer handle the final transition.
6. Keep the old hosting active until you've verified everything.

cPanel specifically recommends lowering TTL before migrations, and its Live Transfer process is designed to reduce downtime. cPanel & WHM Documentation cPanel & WHM Documentation

What I'd look for in the reseller host

Among current reseller offerings, InMotion Hosting is worth a look for an agency because it combines cPanel/WHM with migration support and agency-oriented reseller features; other established options include GreenGeeks, Hosting.com (formerly A2 Hosting), and ScalaHosting. CloudsPress

One important distinction: don't pick a host simply because it advertises "free migrations." For dozens of sites, you want your own repeatable migration mechanism so you're not opening a support ticket for every client.

If you're currently on Plesk

Then Plesk Migrator is also excellent. It can migrate from Plesk, cPanel, and other environments, while keeping production sites running during the transfer. Plesk Plesk Docs

Bottom line: For a design studio, I'd favor cPanel/WHM reseller hosting with Live Transfer over a proprietary hosting dashboard. It gives you the most straightforward path to moving 20–100+ client accounts while keeping sites live, and it leaves you with a familiar management environment as your client roster grows. cPanel & WHM Documentation

If you tell me roughly how many sites (e.g. 20, 50, 100), WordPress vs. other CMSs, and your monthly hosting budget, I can narrow it down to 2–3 specific reseller plans.

For a growing design studio managing dozens of client sites, I’d prioritize migration tooling and operational simplicity over the cheapest reseller plan.

My pick: InMotion Hosting

InMotion Hosting is probably the best fit if you want a conventional WHM + cPanel setup that your team can learn quickly. Current 2026 comparisons highlight it for agency-friendly management and migrations, and its reseller plans include WHMCS on qualifying plans. CloudsPress Forbes

The key advantage is that cPanel's Transfer Tool can migrate multiple cPanel accounts, and its Live Transfer mode is specifically designed to reduce downtime during moves. cPanel & WHM Documentation

How I'd rank the options

• InMotion Hosting — best overall for a design agency. Good combination of WHM/cPanel, reseller isolation, migrations, support, and WHMCS automation. CloudsPress Forbes
• Verpex — best if migration simplicity is your #1 concern. Its reseller offering emphasizes free migrations, white-label cPanel/WHM, backups, and multiple server locations. Hostinglar
• ScalaHosting — best if you're growing toward a VPS/cloud setup. It gives you an alternative control panel and a path toward larger infrastructure, though the workflow isn't as universally familiar as cPanel/WHM. HostingProMax
• 20i — interesting if you don't care about cPanel. Its account-oriented platform can scale substantially, but I'd choose cPanel/WHM for a studio whose developers already work with conventional hosting environments. iTechGuides

One important caveat about "zero downtime"

No reseller host can literally guarantee zero downtime simply because you use its migration service. The DNS, database writes, email, caching, and application architecture matter.

For cPanel-to-cPanel migrations, the safer pattern is:

1. Create the client accounts on the new server.
2. Transfer the sites while they remain live on the old server.
3. Lower DNS TTL ahead of the cutover.
4. Perform a final database/file sync where necessary.
5. Switch DNS.
6. Keep the old server online while DNS propagates and verify every site.
7. Only then decommission the old hosting.

cPanel's own documentation says Live Transfer is intended to reduce downtime, but also notes that DNS configuration needs to be handled correctly. cPanel & WHM Documentation

For dozens of sites, I'd also add WHMCS once you're past the initial migration. It can automate provisioning, account syncing, billing, upgrades, suspensions, and client self-service rather than making your designers/developers administer every account manually. WHMCS WHMCS Documentation

Bottom line: I'd start with InMotion + WHM/cPanel + WHMCS, unless your existing sites aren't predominantly cPanel. If you tell me roughly how many sites (e.g. 30/50/100), WordPress vs. other CMSs, and whether they're currently on cPanel, I can narrow this down to the specific plan/setup I'd use.

For a growing design studio managing dozens of client sites, I’d shortlist 20i, InMotion Hosting, and SiteGround—but 20i is my first choice if minimizing migration downtime is the priority.

Why I'd pick 20i

20i's Migration Center can automatically move files, databases, and email from cPanel/WHM, DirectAdmin, Plesk, or FTP/SFTP, which is particularly useful when your client portfolio came from several different hosts. It also specifically advertises migration from other WHMCS resellers with no downtime. 20i

That makes it a better fit than simply choosing the cheapest reseller plan. With dozens of sites, the operational burden of moving accounts is more important than saving a few dollars per month.

For comparison, cPanel's own Transfer Tool can copy multiple cPanel accounts, packages, and configurations between servers, so a cPanel-based provider such as InMotion can also make bulk migrations fairly straightforward. cPanel & WHM Documentation

The important caveat about "zero downtime"

I'd still plan migrations as near-zero-downtime cutovers, rather than promising literally zero downtime to clients.

A good workflow is:

1. Create the destination account.
2. Copy the site/database and email while the old site remains live.
3. Lower DNS TTL ahead of the cutover.
4. Do a final database/file sync.
5. Switch DNS.
6. Keep the old hosting active until DNS propagation and the site have been verified.

For a design studio, I'd also prioritize automated backups, staging, isolated client accounts, white-label branding, and an API/automation layer over raw storage quotas.

Bottom line:
20i if migration efficiency and scaling are your #1 concerns; InMotion if you want the familiar cPanel/WHM agency model; SiteGround if you're overwhelmingly managing WordPress sites and want a more managed experience. Independent 2026 comparisons similarly highlight 20i's ease of use and InMotion's traditional cPanel/WHM strengths. Itechguides G2

If you tell me roughly how many sites (e.g. 30, 75, 150), whether they're mostly WordPress, and whether you currently use cPanel, I can narrow this to the best specific plan and migration strategy.

The important caveat about "zero downtime"

I'd still plan migrations as near-zero-downtime cutovers, rather than promising literally zero downtime to clients.

A good workflow is:

For a growing design studio managing dozens of client sites, I’d prioritize migration tooling + account isolation + white-label management + an easy upgrade path, rather than simply picking the cheapest reseller plan.

My shortlist

1. InMotion Hosting — best overall for an agency

• Strong fit if you want traditional WHM/cPanel.
• Particularly attractive for migrations: InMotion advertises unlimited migrations, and its reseller plans support roughly 25–100 accounts depending on tier. Forbes Cloudspress
• WHM makes it straightforward to keep each client in a separate account, which is much safer than putting dozens of sites under one shared login.
• Good choice if your designers/developers aren't infrastructure specialists.
• Verpex — best if migration simplicity is the priority

• Current reseller comparisons highlight cPanel/WHM, white-label hosting, free migrations and automated backups. Hostinglar
• I'd seriously consider it if you want the hosting operation to feel relatively turnkey.
• KnownHost — good value as you scale

• Worth considering if you're comfortable with cPanel/WHM and expect to grow into larger infrastructure.
• Recent 2026 comparisons put its reseller offering at 25–100 accounts, with cPanel/WHM and an upgrade path beyond basic reseller hosting. Itechguides

The important part: "without downtime"

No reseller host can honestly guarantee zero downtime for every migration. The migration mechanism and DNS strategy matter enormously.

If you're moving existing cPanel sites, I'd specifically choose a host where you can use cPanel's Transfer Tool/Live Transfer. cPanel says Live Transfer is designed to reduce downtime by moving the account while continuing to proxy traffic to the old server during the transition. cPanel & WHM Documentation cPanel & WHM Documentation

A good workflow is:

old host → copy accounts → test sites → lower DNS TTL beforehand → incremental/final sync → DNS cutover → monitor → retire old accounts

That lets you migrate dozens of sites in batches rather than taking the whole studio offline.

What I'd choose

For most design studios: InMotion.
It's the safest "boring but effective" choice: cPanel/WHM, agency-oriented management, migration assistance, white-label capability, and enough account capacity to handle a growing client roster. Forbes

If minimizing migration hassle is your #1 concern: Verpex.

And if you're already hosting the sites on cPanel, I'd favor a cPanel/WHM reseller over a proprietary panel specifically because the migration path is much more standardized.

If you tell me roughly how many sites (e.g. 30, 75, 150), WordPress vs. other CMS, and your monthly hosting budget, I can narrow this to the best 2–3 plans and compare the actual migration limits, backups, storage, and renewal pricing.

For a growing design studio managing dozens of client sites, I’d shortlist 20i, InMotion, and Verpex—but 20i is my pick if easy migrations and low operational overhead are the priority.

My ranking

1. 20i.com — best for easy bulk migrations

• Its in-house Migration Center can migrate sites, databases, and email from cPanel/WHM, Plesk, DirectAdmin, or FTP/SFTP. 20i
• It explicitly advertises migration from other WHMCS resellers with no downtime. 20i
• Automated provisioning, WHMCS integration, white-label tools, and an API make it particularly attractive as the studio grows.
• Downside: it uses its own hosting control stack rather than the familiar cPanel/WHM workflow.
• inmotionhosting.com — best if you want traditional cPanel/WHM

• Strong choice for agencies that want each client isolated into a conventional cPanel account.
• Its reseller offering has a particularly good migration reputation; Forbes specifically highlights unlimited migrations. Forbes
• WHMCS and white-label functionality make client management straightforward.
• Downside: the ecosystem involves more separate pieces than 20i.
• verpex.com — good middle ground

• cPanel/WHM, white-label hosting, backups, and free migrations make it attractive for a design agency that doesn't want to abandon cPanel. Hostinglar
• Worth considering if your existing sites are predominantly cPanel and you want the transition to feel familiar.

The important part about “no downtime”

No reseller host can magically guarantee zero downtime for every migration. DNS, email, databases, and applications with constantly changing data are the tricky parts.

If you're moving cPanel accounts, cPanel's own Live Transfer can reduce downtime by copying the account, updating DNS, proxying traffic, and recopying mailbox data before the source account is suspended. cPanel & WHM Documentation cPanel & WHM Documentation

For a studio with, say, 30–100 client sites, I'd therefore use this workflow:

Pre-stage → migrate → test on destination → lower DNS TTL → final sync → DNS cutover → monitor → retire old hosting.

That lets you migrate most brochure/WordPress sites with essentially no visible interruption, while giving you a controlled procedure for the few sites that need special handling.

Bottom line: If your biggest pain is “I don't want my designers spending days manually moving 40 client sites,” I'd choose 20i. If your team already knows cPanel/WHM and wants to preserve that workflow, I'd choose InMotion instead.

For a growing design studio managing dozens of client sites, I’d prioritize migration automation + low-downtime cutover + easy ongoing client management, rather than simply choosing the cheapest reseller plan.

My pick: 20i

20i.com is particularly compelling for an agency because its Migration Center can automatically migrate files, databases, and email from cPanel/WHM, DirectAdmin, Plesk, or FTP/SFTP. It also advertises migrations from other WHMCS resellers with no downtime and has automated provisioning. 20i

That combination is a good fit if your studio is likely to go from, say, 20 sites → 50 → 100+ and you don't want every migration to become a custom technical project.

Strong alternative: cPanel/WHM reseller hosting

If your current sites are predominantly cPanel, I'd seriously consider a reseller host that gives you full cPanel + WHM access.

cPanel's Transfer Tool can move multiple accounts, packages and configurations, and its Live Transfer keeps the original server operating while the data is synchronized and DNS is switched. cPanel specifically describes Live Transfer as a zero-downtime migration mechanism. cPanel cPanel & WHM Documentation

This is arguably the safest ecosystem if you expect to migrate a large portfolio repeatedly.

One caveat: "zero downtime" doesn't mean zero migration risk. You still need to validate each site, handle DNS correctly, and account for things such as active sessions. cPanel & WHM Documentation cPanel & WHM Documentation

Also worth considering: InMotion

inmotionhosting.com is attractive if you want less hands-on migration work. Its reseller documentation says it offers free "white-glove" migrations and supports moving sites from both cPanel and non-cPanel hosts, including databases, email and SSL. InMotion Hosting

How I'd choose

For a design studio specifically, I'd start with 20i if convenience is the priority. If your existing portfolio is overwhelmingly cPanel, I'd lean toward a cPanel/WHM reseller or VPS because the native Live Transfer tooling is exceptionally useful for bulk migrations.

And whichever you choose, I'd migrate one low-risk client first, validate DNS/SSL/email/forms/analytics, then batch the remaining sites rather than moving all dozens at once.

For a growing design studio managing dozens of client sites, I’d put InMotion Hosting’s reseller platform at the top of the shortlist—especially if your priority is easy bulk migration with minimal disruption.

My pick: InMotion Hosting

inmotionhosting.com

Why it fits an agency workflow:

• White-glove migrations: InMotion says its reseller migrations are handled by its experts and are designed for no-downtime moves. InMotion Hosting InMotion Hosting
• cPanel/WHM: This is important if your existing clients are already on cPanel. You can keep each client in a separate account rather than lumping dozens of sites together. cPanel & WHM Documentation
• Built for scaling: Their reseller offering is explicitly designed around managing multiple client accounts, with an upgrade path toward VPS/dedicated infrastructure. InMotion Hosting InMotion Hosting
• 24/7 human support: Useful when a migration involves client email, DNS, SSL, or a quirky legacy WordPress installation. InMotion Hosting

One important distinction

If you want to do the migrations yourself, I'd favor a provider giving you full cPanel/WHM access, because cPanel's current Transfer Tool can migrate multiple accounts and its Live Transfer feature keeps the source sites running while data is copied and then performs a final sync before DNS changes. cPanel & WHM Documentation cPanel

That makes the migration workflow roughly:

copy sites → test on new server → final sync → switch DNS → keep old server temporarily

rather than taking every client site offline during the move.

What I'd choose

One caveat: “zero downtime” isn't literally guaranteed for every site—DNS caching, external DNS providers, applications with constantly changing databases, and email configurations can complicate a cutover. cPanel's Live Transfer is specifically designed to reduce disruption and synchronize data before the switch. cPanel & WHM Documentation

If you tell me roughly how many sites (e.g. 20, 50, 100), whether they're mostly WordPress, and what host you're migrating from, I can narrow this to the best 2–3 options and compare price, migration limits, client management, backups, and white-labeling.

For a growing design studio managing dozens of client sites, I’d prioritize migration tooling + low-downtime cutovers + client isolation over simply finding the cheapest reseller plan.

My pick: 20i

20i is particularly attractive if your biggest pain point is migrating a portfolio of sites. Its Migration Center can automatically migrate files, databases, and email from cPanel/WHM, DirectAdmin, Plesk, or FTP/SFTP. 20i also specifically advertises no-downtime migration from other WHMCS resellers. 20i

20i.com

The other big advantage for a studio is automation: 20i offers WHMCS integration, automated provisioning, ticketing/self-service tools, and an API. That becomes valuable once you're managing 30–100+ client sites rather than treating hosting as a manual service. 20i

If you want traditional cPanel/WHM: InMotion

InMotion Hosting is my alternative if your team wants the conventional WHM → individual cPanel accounts workflow. It has a strong reputation specifically around handling lots of migrations, and its reseller offering includes white-labeling and WHMCS. Forbes

inmotionhosting.com

One important point about "zero downtime"

No reseller host can magically guarantee zero downtime for every migration. The migration method matters.

If you're moving cPanel → cPanel, cPanel's own Live Transfer can reduce downtime by copying the account, updating DNS, proxying traffic, and copying mailbox data again before the old account is suspended. cPanel & WHM Documentation cPanel & WHM Documentation

For a studio, I'd therefore use this workflow:

1. Create the new client account.
2. Perform the initial migration while the old site remains live.
3. Lower DNS TTL ahead of the cutover.
4. Run a final database/file sync.
5. Switch DNS.
6. Keep the old hosting active temporarily so you can roll back if necessary.
7. Verify SSL, forms, email, DNS records, cron jobs, and third-party integrations.

Quick decision

Bottom line: For a design studio specifically trying to move dozens of existing client sites with minimal disruption, I'd start with 20i. Its dedicated Migration Center and automation are unusually well aligned with an agency workflow. If your team already lives in cPanel/WHM and doesn't want to learn another management interface, InMotion is the safer conventional choice. 20i Forbes

If you tell me roughly how many sites (e.g. 30, 75, 150), WordPress vs. other CMSs, and your current host, I can narrow this down to the best specific plan and migration strategy.

inmotionhosting.com

One important point about "zero downtime"

No reseller host can magically guarantee zero downtime for every migration. The migration method matters.

If you're moving cPanel → cPanel, cPanel's own Live Transfer can reduce downtime by copying the account, updating DNS, proxying traffic, and copying mailbox data again before the old account is suspended.

For a studio, I'd therefore use this workflow:

For a growing design studio managing dozens of client sites, I’d prioritize migration tooling and agency workflow over the cheapest reseller plan.

My top pick: cPanel/WHM-based reseller hosting

The strongest setup is a reseller host that uses cPanel + WHM and supports Live Transfer. cPanel’s current Transfer Tool can move multiple accounts, packages, and configurations, while Live Transfer keeps the old server serving traffic during the migration and performs a final sync before DNS changes. cPanel & WHM Documentation cPanel

That makes it particularly good for your situation: you can migrate sites in batches rather than taking dozens of client sites offline simultaneously.

Hosts I'd shortlist

• 20i — probably the easiest all-in-one reseller experience. Its Migration Center supports cPanel/WHM, Plesk, DirectAdmin and FTP/SFTP, and it advertises free/unlimited migrations. It also includes WHMCS integration and automation. 20i 20i

20i.com

• hosting.com — excellent if you'd rather have the provider do the bulk migration for you. They explicitly support large-scale reseller transfers, including hundreds of cPanel accounts, with their migration team handling the move and coordinating the DNS cutover. hosting.com

hosting.com

• InMotion Hosting — worth considering if you want a conventional cPanel/WHM reseller environment and substantial migration support. Forbes currently lists it as a strong option for unlimited migrations and notes its reseller plans use cPanel/WHM and support WHMCS. Forbes

inmotionhosting.com

What I'd choose

20i if your priority is "give our studio one place to manage everything and make migrations painless."

hosting.com if your priority is "we have 30–100+ sites and want the host's migration team to handle the heavy lifting."

If you're already on cPanel, I would specifically choose a destination that supports cPanel/WHM rather than switching control panels just for the sake of it. cPanel's Live Transfer is designed for exactly this sort of low/zero-downtime server migration. cPanel cPanel & WHM Documentation

One important caveat: "zero downtime" doesn't mean DNS can never cause a brief transition issue. For client sites with active orders, forms, memberships, or frequently changing databases, I'd lower DNS TTLs ahead of time, perform an initial transfer, let the old server remain live, do the final sync, then switch DNS. That gives you a much safer migration pattern than simply copying files and flipping nameservers. HostMyCode

If you tell me roughly how many sites (e.g. 25, 50, 100), WordPress vs. other CMSs, and your current host, I can narrow this to the best 2–3 reseller plans and compare migration, backups, white-labeling, WHMCS, and likely monthly cost.

For a growing design studio, I’d prioritize cPanel/WHM with its built-in Transfer Tool, ideally through a reseller host that gives you enough WHM access. It is probably the best fit if your main pain point is moving dozens of existing client sites.

Why I’d pick it

• Bulk migrations: WHM can transfer multiple cPanel accounts, packages, and configurations rather than making you migrate sites one by one. cPanel & WHM Documentation cPanel & WHM Documentation
• Minimal/no downtime: cPanel’s Live Transfer keeps the old server serving traffic while data is copied, performs a final sync, and then switches DNS. cPanel specifically describes it as a zero-downtime migration mechanism. cPanel cPanel & WHM Documentation
• Good for client hosting: You can preserve accounts, packages, email, databases, SSL, and other hosting configuration, making it much easier to keep each client isolated. cPanel & WHM Documentation
• Scales with you: cPanel supports transferring all accounts owned by a particular reseller, which is particularly useful once your client count grows. cPanel Support
• Broad source support: If you're consolidating clients from different hosts, cPanel's Transfer Tool can migrate from cPanel/WHM, Plesk, DirectAdmin, and Ensim. cPanel Support

The important catch

Don't choose a reseller plan solely because it advertises "free migrations." For your use case, I'd specifically verify that you get WHM + Transfer Tool/Live Transfer access and that your old host allows the required access. cPanel says its full Transfer Tool requires root/sufficient privileges on the source server; without that, you're pushed toward backup/restore migrations instead. cPanel Support

Also, "zero downtime" doesn't mean literally nothing changes: DNS propagation, active sessions, email, and unusual applications can still require care. cPanel notes, for example, that some active PHP sessions may not survive the move. cPanel & WHM Documentation

What I'd use for a design studio

Best setup:
Managed VPS + cPanel/WHM + WHMCS, rather than a basic shared reseller account.

That gives you a much better long-term workflow:

Client site → cPanel account → WHM → automated migration → DNS cutover → client billing/support

If you're currently at the stage of dozens of sites and expecting to reach 50–100+, I'd lean toward a managed VPS rather than repeatedly upgrading reseller tiers. It gives you more predictable resources and control while retaining the easy account-transfer workflow.

cpanel.net is worth reviewing before choosing the host.

If you tell me roughly how many sites you have (e.g. 20, 50, 100), whether they're mostly WordPress, and your monthly hosting budget, I can narrow this down to 3 specific reseller/VPS providers and compare migration ease, cost, WHM/WHMCS, backups, and client management.

For a growing design studio managing dozens of client sites, I’d prioritize easy bulk migration + low/no downtime + agency management, rather than simply the cheapest reseller plan.

My pick: InMotion Hosting

InMotion Hosting is probably the best fit if your clients mostly run WordPress/PHP sites and you want the traditional WHM + cPanel workflow. Its reseller plans are specifically positioned around migrations, and current comparisons highlight its combination of support, migration assistance, WHM/cPanel, white-labeling, and WHMCS. Cloudspress Forbes

inmotionhosting.com

The big advantage for your use case is that cPanel's Transfer Tool can move multiple accounts, and its Live Transfer feature is designed to reduce downtime by keeping traffic flowing while accounts are migrated. cPanel & WHM Documentation cPanel Support

Strong alternative: SiteGround Agency

If your studio is primarily WordPress-focused and you care more about an easy agency dashboard than traditional cPanel/WHM, SiteGround is worth serious consideration. Its Agency Hosting program supports 5 to 500+ sites, white-label hosting, client access controls, custom hosting packages, and moving sites between accounts. SiteGround

siteground.com

How I'd choose

One important caveat: "zero downtime" isn't something a host can guarantee simply by offering migrations. The safest approach is to copy the sites first, test them on the new server, lower DNS TTL beforehand, then perform the DNS cutover while the old server remains live. cPanel's Live Transfer specifically exists to reduce this transition downtime. cPanel & WHM Documentation hostmycode.com

Bottom line: For a design studio moving, say, 20–100 client sites, I'd start with InMotion's reseller platform unless you're exclusively WordPress—in which case I'd compare it directly against SiteGround Agency.

For a growing design studio managing dozens of client sites, I’d prioritize cPanel/WHM + bulk migration + white-label client management, rather than simply picking the cheapest reseller plan.

My pick: InMotion Hosting

inmotionhosting.com is probably the best fit if you want an agency-friendly, traditional reseller setup. Current 2026 comparisons highlight its combination of WHM/cPanel, WHMCS, and domain-reseller functionality, which is useful when your studio is managing many separate clients. Itechguides How To Hosting Guide

The bigger reason I'd choose a cPanel-based platform is migration: cPanel/WHM's Transfer Tool can move multiple accounts, and its Live Transfer functionality keeps the old server operating while data is synchronized and traffic is moved over. That makes it much better suited to dozens of production sites than manually copying WordPress installations one by one. cPanel cPanel & WHM Documentation

Other good choices

• Verpex — a strong alternative if you primarily want straightforward white-label reseller hosting with cPanel/WHM, free migrations, and room to grow. Hostinglar
• Aveshost — particularly interesting if you want the provider to handle migrations for you; it advertises free client migrations and a free WHMCS license with its reseller plans. Aveshost
• 20i — worth considering if you're happy not using cPanel. It offers a more modern proprietary management stack and can scale to large numbers of sites, but the migration workflow won't be as familiar if your existing clients are on cPanel. Itechguides
• KnownHost — another good cPanel/WHM option for an agency that wants more traditional hosting infrastructure and doesn't mind handling some of the billing/automation setup separately. Itechguides

What I'd do for your situation

If you're moving 20–100+ existing client sites, I'd choose a cPanel/WHM reseller or managed VPS, then migrate in batches:

1. Provision the new server/reseller account.
2. Copy the client accounts using WHM's Transfer Tool.
3. Test each site on the new server before DNS changes.
4. Lower DNS TTLs ahead of the cutover.
5. Use Live Transfer/final synchronization.
6. Switch DNS only after the new copies are verified.
7. Keep the old hosting active until you've confirmed DNS, email, SSL, forms, and databases are working.

cPanel specifically describes Live Transfer as a way to reduce downtime by keeping the source server operational during the transfer and performing synchronization before the DNS switch. cPanel & WHM Documentation

Bottom line: for a design studio, I'd pick InMotion if you want an all-in-one agency/reseller operation, or Verpex if migration simplicity and white-label hosting are the bigger priorities. If you tell me roughly how many sites (e.g. 30, 75, 150), whether they're mostly WordPress, and what you're migrating from, I can narrow it down to the best plan and estimate the likely monthly cost.

For a growing design studio managing dozens of client websites, I’d prioritize a reseller platform with:

• batch migrations
• staging/testing before DNS cutover
• automatic SSL handling
• easy client account isolation
• white-label branding
• reliable backups
• minimal downtime workflows

The best choice depends on your current stack, but these are the strongest options:

1. cPanel + WHM reseller hosting — best overall for agencies

A cPanel/WHM reseller account is usually the easiest path for a design studio because many client sites already run on cPanel. WHM’s Transfer Tool can copy multiple accounts, packages, and configurations between servers, and its Live Transfer feature is designed to reduce downtime during migrations. cPanel & WHM Documentation

Good fits:

• WordPress-heavy agencies
• 20–200+ client sites
• Studios that want to resell hosting under their own brand

Look for providers offering:

• WHM access (not just cPanel)
• free migration assistance
• daily backups
• LiteSpeed or similar performance stack
• staging tools
• white-label nameservers

Examples of reseller hosts worth evaluating:

• Verpex — strong white-label reseller focus and cPanel/WHM options are commonly marketed for agencies. Hostinglar
• A2 Hosting — known for agency-oriented hosting products and migration support.
• InMotion Hosting — offers reseller hosting aimed at managing multiple client accounts.

2. Plesk — best if your studio manages mixed stacks

Plesk is a good choice if you handle:

• WordPress
• Laravel/PHP apps
• client sites needing more granular subscription management

Its Migrator tool supports moving from other hosting environments and can keep websites running during transfer preparation, allowing DNS switching later. Plesk Plesk

3. Managed cloud hosting + reseller workflow — best for higher-value clients

If your studio hosts fewer but more important sites (e.g., ecommerce, membership sites, business-critical websites), consider managed cloud rather than classic reseller hosting.

Common agency setups:

• managed VPS
• separate client containers/accounts
• staging environments
• automated backups
• CDN/WAF layer

This costs more but reduces support headaches.

Migration workflow I’d use for dozens of sites

1. Create the new hosting environment first

• Match PHP versions
• Set up databases
• Configure SSL
• Import sites
• Migrate in batches

• 5–10 low-risk sites first
• Validate before moving the rest
• Lower DNS TTL values

• Do this 24–48 hours before cutover
• Sync final changes

• Database sync for active sites
• Upload any new files
• Switch DNS

• Most visitors transition without noticing
• Keep old hosting active

• Usually 3–7 days after migration

My recommendation for a growing design studio

For most studios, I’d choose:

cPanel/WHM reseller hosting + a migration service + Cloudflare DNS/CDN

It gives you the simplest client management model and the least operational overhead. If you’re already managing 50+ sites or want to offer premium hosting tiers, move toward a managed VPS with WHM/cPanel or Plesk.

The key question is: are your current client sites mostly WordPress on cPanel, or are they spread across platforms (WordPress, Shopify, Laravel, custom apps, etc.)? That changes the best migration tool choice.

For a growing design studio managing dozens of client sites, I’d prioritize the migration workflow over the reseller hosting brand itself. The best setup is usually a reseller platform with WHM/cPanel, because the migration tooling is mature and lets you move multiple client accounts with minimal disruption.

My shortlist:

My recommendation for your use case

Choose a cPanel/WHM reseller account or managed VPS with WHM and make the migration process:

1. Create each client as a separate cPanel account.
2. Use WHM Transfer Tool for bulk migrations where possible.
3. Lower DNS TTLs before moving domains.
4. Perform an initial sync while the old sites remain live.
5. Do a final sync + DNS switch during a low-traffic window.
6. Keep the old hosting active for a few days as rollback insurance.

For dozens of sites, I would avoid a reseller host that only gives you a WordPress migration plugin or manual file copying. You want account-level migration: files, databases, mailboxes, SSL certificates, and DNS-related settings. www.cpanel.net

A few questions would change the recommendation:

• Are most of the sites WordPress, static, ecommerce, or mixed?
• Are the current hosts mostly cPanel, Plesk, SiteGround-style managed hosting, etc.?
• Do you also want to resell hosting to clients (with invoices/white labeling), or just manage your studio’s client sites?

For a growing design studio managing dozens of client sites, I’d put 20i at the top of the shortlist if your priority is easy, bulk, low-downtime migrations.

My ranking

Why 20i stands out: its Migration Center is designed specifically for bulk moves. It can migrate multiple sites in batches, including files, databases and email, and supports migrations from cPanel, Plesk and DirectAdmin. 20i explicitly says the sites remain accessible during the process, with no downtime, and lets you preview migrated sites before switching DNS. www.20i.com

20i reseller hosting and migration

When I'd choose KnownHost instead

If your studio already works heavily with cPanel/WHM, I'd probably choose KnownHost. Its reseller plans use CloudLinux for account isolation and include cPanel, backups, Softaculous, and migration assistance. KnownHost also says moving to a larger reseller plan can be done without downtime. www.knownhost.com

KnownHost reseller hosting

The important distinction

For your use case, don't optimize primarily for storage or bandwidth. I'd prioritize:

1. Bulk migration tooling — moving 30–100 sites shouldn't mean 30–100 manual migrations.
2. DNS-safe migration workflow — copy first, test, synchronize, then change DNS.
3. Account isolation — each client should have their own hosting account/resources.
4. Automated backups — preferably before and after migration.
5. White-labeling — clients shouldn't necessarily know your underlying host.
6. Easy upgrade path — dozens of sites can turn into hundreds surprisingly quickly.

If you're coming from another cPanel host, KnownHost is the safer conventional choice. If you're willing to move away from cPanel and want the least painful bulk migration workflow, 20i is the more compelling choice.

One caveat: “no downtime” isn't literally guaranteed for every site—especially dynamic/e-commerce sites where database writes continue during migration. The safest process is initial copy → test → final sync → DNS switch, which is also the general approach recommended by migration tooling such as Plesk's Migrator. www.knownhost.comsupport.plesk.com

My pick for a design studio: 20i for migration simplicity; KnownHost if cPanel/WHM compatibility is non-negotiable.

For a growing design studio managing dozens of client sites, I’d shortlist 20i and Cloudways, with 20i as the better fit if you specifically want reseller hosting.

My pick: 20i

20i is unusually well suited to bulk migrations. Its reseller platform has:

• Automatic Migration Center for files, databases, and email
• Support for cPanel/WHM, Plesk, DirectAdmin, FTP/SFTP, etc.
• Unlimited free migrations
• Explicit support for migrating from another reseller without downtime
• WHMCS integration and automated provisioning
• White-label reseller functionality and an API for automating your own workflows www.20i.com

20i reseller hosting

That's a strong combination for a studio that wants to say, "we host and maintain all our clients' sites" without building a complicated hosting operation internally.

When I'd choose Cloudways instead

Cloudways makes more sense if most of your sites are WordPress/WooCommerce and performance/scalability matter more than traditional reseller features.

Its agency platform lets you put many client sites on a server, and Cloudways says its managed migration service can move sites with no downtime. WordPress migrations can be performed in unlimited numbers through its migrator, while agency customers can also get expert-managed migrations. www.cloudways.com

Cloudways Agency Hosting

The tradeoff is that Cloudways isn't a conventional WHM/cPanel reseller environment, so it's less attractive if your studio wants conventional hosting accounts, white-label cPanel, and straightforward hosting resale.

What I'd use for your situation

One important point: "zero downtime" isn't something the hosting provider alone can guarantee. The safest migration is to copy the site while the old one remains live, test the new copy, lower DNS TTL beforehand, then switch DNS and perform a final database/files sync where necessary. That matters especially for ecommerce, forms, memberships, and other sites with constantly changing data.

Bottom line: For a design studio that wants a genuine reseller business + easy migration of dozens of existing accounts, I'd start with 20i. If you're primarily a WordPress agency and don't care about cPanel-style resale, Cloudways is arguably the easier managed platform.

For a growing design studio managing dozens of client sites, I’d prioritize cPanel/WHM-based reseller hosting with Live Transfer rather than a host whose migration process is primarily one-site-at-a-time.

My pick: cPanel/WHM + a provider with assisted migrations

The key tool is cPanel & WHM’s Transfer Tool. It can migrate multiple cPanel accounts, packages, and configurations in bulk. More importantly, its Live Transfer feature keeps the source sites running while data is copied, then performs a final sync and switches traffic, minimizing disruption. docs.cpanel.net

For a studio, that gives you:

• One cPanel account per client — cleaner isolation and easier handoffs.
• Bulk migration instead of manually moving every WordPress installation.
• Live Transfer for minimal/no user-visible downtime.
• Centralized management through WHM.
• Easier scaling as your client count grows. www.hostgator.com

Provider I'd shortlist: Liquid Web

Liquid Web is particularly attractive if your priority is easy migrations rather than squeezing out the absolute lowest hosting price. Its cPanel/WHM offering includes assisted migrations, and it explicitly advertises help moving sites with minimal downtime. www.liquidweb.com

I'd choose Liquid Web + cPanel/WHM if your studio wants to spend less time being a sysadmin and more time doing design/development.

One important caveat

"Zero downtime" isn't something I'd promise blindly. DNS, email, applications with constantly changing data, and unusual server configurations can introduce edge cases. cPanel's Live Transfer is specifically designed to reduce downtime, but you still need to prepare DNS correctly and verify each site before retiring the old server. docs.cpanel.net

If you're migrating 20–100+ sites, I'd also favor a VPS/cloud reseller setup over basic shared reseller hosting. You'll have considerably more room for traffic spikes and resource-heavy client sites.

Bottom line:
Best overall for your use case: Liquid Web + cPanel/WHM Transfer Tool.
Best feature to insist on: Live Transfer.
Avoid: reseller platforms where migrations require manually copying each WordPress site or relying solely on DNS propagation.

If you tell me roughly how many sites you have (e.g. 20, 50, 100), WordPress vs. other CMSs, and your monthly hosting budget, I can narrow this down to 2–3 specific reseller plans.

For a growing design studio managing dozens of client sites, I’d shortlist Cloudways and SiteGround, with Cloudways as my first choice if painless migration is the priority.

🥇 Cloudways — best for migration-heavy agencies

Cloudways

Why it stands out:

• Unlimited free WordPress/WooCommerce migrations, either self-service or handled by their experts. support.cloudways.com
• Cloudways explicitly supports migrations designed for zero/minimal downtime and provides a managed migration workflow. www.cloudways.com
• Its agency offering includes white-label hosting, centralized client management, resource allocation, and unlimited migrations. www.digitalocean.com
• You can keep the old site live while the copy is migrated and tested, then switch DNS—much safer than taking sites offline during a move.
• Particularly attractive if most of your portfolio is WordPress/WooCommerce.

Caveat: Cloudways isn't traditional cPanel/WHM reseller hosting. If your studio wants each client to have a conventional hosting account with cPanel/WHM, look elsewhere.

🥈 SiteGround — best if client-facing management matters more

SiteGround Agency Hosting

SiteGround is arguably the nicer fit if you're building hosting + maintenance as a productized service. Its agency platform provides one dashboard for multiple sites, white-label Site Tools, granular client access, custom hosting packages, and the ability to transfer sites between accounts. www.siteground.com

For migrations, it offers a WordPress Migrator and, for qualifying agencies, white-glove end-to-end migrations. www.siteground.com

My pick for your situation

The important distinction: don't choose based simply on who advertises "free migration." For dozens of sites, you want a workflow where you can clone → test on the new server → lower DNS TTL → perform a final sync → switch DNS → keep the old host running until propagation is complete. That is what actually makes a migration effectively downtime-free.

If your clients are mostly WordPress, I'd go Cloudways. If you tell me roughly how many sites, WordPress vs. non-WordPress, current host (e.g. GoDaddy/HostGator), and whether clients need their own hosting logins, I can narrow it down to the best 2–3 options for your studio.

For a growing design studio managing dozens of client sites, I’d prioritize easy bulk migration + low/no downtime + white-label client management over simply finding the cheapest reseller plan.

My pick: cPanel/WHM-based reseller hosting

The strongest fit is Verpex if you want a straightforward white-label reseller setup. Current comparisons highlight its cPanel/WHM environment, white-label capabilities, backups, and migration assistance. go.hostinglar.com

But the really important part is the underlying cPanel/WHM Transfer Tool. It can migrate multiple cPanel accounts, including configurations, databases, email, SSL, and files. Its Live Transfer process keeps the old server running while the destination is populated, then performs synchronization and DNS changes to minimize disruption. docs.cpanel.net

Shortlist

Verpex
InMotion Hosting
SiteGround Agency Hosting
ScalaHosting

For your specific requirement, I'd choose Verpex + cPanel/WHM. The key is that you can migrate client sites in batches rather than manually rebuilding each one. If the current hosts are also cPanel-based, the process is particularly clean because cPanel's Live Transfer is specifically designed to reduce downtime. docs.cpanel.net

One caveat: "zero downtime" isn't literally guaranteed for every site—DNS caching, third-party DNS, email, dynamic databases, and unusual server configurations can introduce brief inconsistencies. I'd lower DNS TTLs beforehand, copy the sites while live, test the destination, then do the final sync/cutover.

If you tell me roughly how many sites you have (e.g. 30, 75, 150), whether they're mostly WordPress, and what they're currently hosted on, I can narrow this to the best plan and migration workflow.

For a growing design studio managing dozens of client sites, I’d choose InMotion Hosting’s reseller platform with cPanel/WHM, primarily because it combines white-label reseller hosting with hands-on migration support and a cPanel-based workflow. InMotion explicitly advertises zero-downtime reseller migrations and cPanel-to-cPanel transfers. www.inmotionhosting.comwww.inmotionhosting.com

My ranking

Why InMotion gets my vote: its reseller plans provide cPanel & WHM, white-label hosting, backups, billing tools, and migration assistance. Their migration service says they can move reseller cPanel accounts with no downtime. www.inmotionhosting.comwww.inmotionhosting.com

The underlying cPanel/WHM Transfer Tool is particularly important if you're talking about dozens of sites. It can transfer multiple cPanel accounts, packages, and configurations, while Live Transfer keeps the source sites operational, performs synchronization, and handles the DNS cutover. www.cpanel.netdocs.cpanel.net

The workflow I'd use

1. Set up the new reseller account/server.
2. Keep the existing host live.
3. Transfer several client accounts at a time.
4. Preview/test each site on the new server.
5. Verify SSL, databases, forms, email, DNS and cron jobs.
6. Perform the final sync and DNS cutover.
7. Keep the old hosting active until everything is confirmed.

That approach is much safer than trying to migrate everything during one overnight outage. cPanel specifically documents Live Transfer as a way to reduce downtime during cPanel-to-cPanel moves. www.cpanel.netdocs.cpanel.net

One caveat: "zero downtime" doesn't mean literally zero risk. DNS caching, email, sites with constantly changing databases (e-commerce, memberships, bookings), and non-cPanel source hosts need extra care.

If your studio is around 20–100 sites, I'd lean strongly toward InMotion + cPanel/WHM. If you're already on cPanel, the migration is especially straightforward. Hostwinds is worth considering if you'd rather have the host's support team do more of the actual migration work; it advertises free reseller website migration. www.hostwinds.com

InMotion Reseller Hosting · cPanel Transfer Tool documentation

For a growing design studio managing dozens of client sites, I’d prioritize easy bulk migration + low-downtime cutovers + solid reseller management over the absolute cheapest plan.

My pick: InMotion Hosting

InMotion Hosting is probably the best fit if you want a fairly hands-off transition.

• Unlimited migrations is a major advantage when you're moving dozens of existing client sites. Forbes specifically rates InMotion as its “Best for Unlimited Migrations.” www.forbes.com
• Uses the familiar WHM + cPanel setup, so each client can have an isolated account rather than everything living under one shared login. www.forbes.com
• WHMCS is available with the reseller plans, which can automate client provisioning and billing as your hosting operation grows. www.forbes.com
• White-label capabilities let the hosting feel like part of your studio rather than a third-party service.
• The human migration assistance is particularly valuable if you're moving 30–100+ sites rather than doing occasional one-off transfers.

InMotion Hosting reseller hosting

Strong alternative: Verpex

Verpex is attractive if you want simple white-label cPanel reseller hosting with free migrations and multiple server locations. Current 2026 comparisons highlight its combination of cPanel/WHM, white labeling, backups and migration assistance. go.hostinglar.com

Verpex reseller hosting

The important part: “no downtime”

The host matters, but the migration procedure matters even more. If you're moving cPanel sites, cPanel's current Transfer Tool supports Live Transfer, specifically designed to reduce downtime. It copies the account to the new server and can update DNS while the old site remains available. go.hostinglar.comdocs.cpanel.net

For a design studio, I'd use this workflow:

1. Lower DNS TTLs several hours/day before migration.
2. Copy each client site to the new server.
3. Test the new copy using a temporary URL/hosts-file override.
4. Perform a final database/file sync.
5. Switch DNS.
6. Keep the old hosting account alive for several days.
7. Monitor forms, email, SSL, WordPress admin, ecommerce and DNS before cancelling the old account.

That approach is much safer than simply downloading/restoring sites and changing nameservers. cPanel itself notes that Live Transfer is intended to reduce downtime, although certain active sessions may require users to log in again. go.hostinglar.comdocs.cpanel.net

Bottom line: I'd choose InMotion if your priority is “get dozens of client sites moved with as little agency-side work as possible.” I'd choose Verpex if you want a potentially leaner, more flexible reseller setup and are comfortable handling more of the operational side yourself.

If you tell me roughly how many sites (e.g. 30, 75, 150), WordPress vs. other CMS, and whether you also host client email, I can narrow this to the specific plan I'd buy and estimate the monthly cost.

For a growing design studio moving dozens of client sites, I’d prioritize easy bulk migration + low-downtime cutover over the cheapest reseller plan.

My pick: InMotion Hosting

InMotion Hosting is probably the best fit if you want a conventional agency/reseller setup. Forbes specifically rates it “Best for Unlimited Migrations,” and its reseller plans use the familiar cPanel + WHM stack, with white-labeling and 25–100 account tiers. www.forbes.com

The important part for your use case is that cPanel's WHM Transfer Tool can move multiple accounts, and its Live Transfer capability is designed to reduce downtime during cPanel-to-cPanel moves. docs.cpanel.net

Shortlist

Verpex is my runner-up if you want a simpler white-label reseller package with cPanel/WHM, backups and migration assistance. go.hostinglar.com

One important caveat about “zero downtime”

No reseller host can magically guarantee zero downtime. For sites with active orders, forms, memberships, etc., the migration process matters as much as the host. Ideally:

1. Lower DNS TTLs before migration.
2. Copy the sites/accounts while they remain live.
3. Test every site on the new server.
4. Perform a final database/file sync.
5. Switch DNS.
6. Keep the old server running until propagation and traffic look clean.

If you're migrating dozens of WordPress/cPanel sites, I'd specifically choose a provider where the migration team will handle the transfers rather than making your designers do them manually. cPanel's own documentation confirms that Live Transfer is intended to reduce transfer downtime, although it has some limitations. docs.cpanel.net

Bottom line: I'd start with InMotion for an agency your size. If you tell me roughly how many sites (e.g. 30, 75, 150), WordPress vs. other CMS, and whether email is hosted there too, I can narrow it down to the specific plan and compare the migration workflow/costs.

For a growing design studio managing dozens of client sites, I’d choose Verpex Reseller Hosting as the easiest migration-first option.

My pick: Verpex

Why it fits your use case:

• Unlimited free migrations — Verpex says its migration team will move all your existing sites, regardless of the number. verpex.comverpex.com
• WHM + cPanel — you get one WHM dashboard for managing separate client accounts, while each client can have their own cPanel. verpex.com
• Designed for agencies/resellers — white-labeling, custom packages, and separate resource allocation make it much cleaner than putting dozens of sites into one shared account. verpex.com
• Migration without planned downtime — Verpex explicitly describes its migration service as seamless and without downtime. verpex.comverpex.com
• 24/7 support and multiple server locations give you some flexibility as the studio grows. verpex.com

Two strong alternatives

One important caveat about "zero downtime"

No host can literally guarantee zero disruption for every site. The safest approach is to copy the sites while they're still live, test them on the new server, then perform the DNS cutover. cPanel's own Live Transfer functionality is specifically designed to reduce downtime and can keep traffic flowing during the transition. docs.cpanel.net

For a studio with, say, 30–80 WordPress sites, I'd therefore prioritize:

WHM/cPanel → managed bulk migrations → staging/testing → DNS cutover → automated backups → client isolation.

If you tell me roughly how many sites you have (e.g. 20, 50, 100), whether they're mostly WordPress, and whether you also host client email, I can narrow this down to the best specific plan and estimate the monthly cost.

For a growing design studio managing dozens of client sites, I’d pick Liquid Web over a bargain reseller host if your priority is easy bulk migration + minimal downtime + room to scale.

My shortlist

Why Liquid Web: its migration team can perform an initial sync, test the migrated sites, then do a final sync before launch. You can keep the old sites live while this happens, limiting the actual interruption to the DNS switch. www.liquidweb.com It also offers cPanel/WHM, automated account management, backups, 24/7 support, and reseller options designed for agencies. www.liquidweb.com

Liquid Web reseller hosting

SiteGround is particularly attractive if your client portfolio is predominantly WordPress. Its agency program is explicitly designed for managing 5 to 500+ sites, with client access controls, white-label hosting, custom packages, and site-transfer/handoff tools. www.siteground.com

SiteGround Agency Hosting

Hostwinds is the budget option I'd consider. Its reseller plans include free migration assistance, and its migration process specifically keeps the existing service online until you've verified the new sites. www.hostwinds.com

Hostwinds reseller hosting

The important part: don't do a "big bang" migration

For dozens of client sites, I'd migrate in batches of 5–10:

1. Lower DNS TTLs ahead of time.
2. Copy each site/database to the new host while the old site remains live.
3. Test the new copy using a temporary URL/hosts-file override.
4. Do a final database/file sync shortly before launch.
5. Change DNS during each site's low-traffic period.
6. Keep the old hosting active for several days as rollback insurance.

That approach matters more for avoiding downtime than the reseller brand itself.

Bottom line:

• 20–100+ mixed client sites: Liquid Web
• Mostly WordPress + agency workflow: SiteGround
• Price-sensitive and relatively simple sites: Hostwinds

If your studio is currently on cPanel, Plesk, WordPress, or a mix, tell me which, and I can narrow this down to the best migration setup and plan.

For a growing design studio managing dozens of client sites, I’d shortlist 20i first—especially if the sites are a mix of WordPress/PHP sites and you want migration to be as hands-off as possible.

My pick: 20i

20i Reseller Hosting

Why it stands out for your use case:

• Purpose-built Migration Center — it can automatically migrate files, databases, and email from cPanel/WHM, Plesk, DirectAdmin, or FTP/SFTP. www.20i.comwhmcspilot.com
• Explicit no-downtime migration support for moving from another WHMCS reseller. www.20i.comwhmcspilot.com
• WHMCS integration and automated provisioning, useful once your studio has dozens of accounts rather than just a handful. www.20i.comwhmcspilot.com
• Reseller API, so you can eventually automate provisioning or connect hosting to your studio's own client workflow. www.20i.comwhmcspilot.com
• It advertises unlimited/free migrations, which is particularly relevant when you're moving dozens of existing clients. www.20i.com

Two alternatives I'd consider

Rocket.net — best if your client portfolio is almost entirely WordPress and you value having the host do the migration work for you. Its reseller offering advertises unlimited free migrations handled by its WordPress team, including migration without service interruption. rocket.net

Rocket.net WordPress Reseller Hosting

InMotion Hosting — worth considering if you specifically want the familiar WHM + cPanel model and strong migration assistance. Forbes currently highlights it for unlimited migrations; its reseller plans also support WHMCS and white-labeling. www.forbes.com

InMotion Hosting

What I'd choose

One important distinction: "no downtime" doesn't mean DNS changes magically have zero propagation time. The safest migration workflow is to copy the site first, verify it on the new server, synchronize databases/files again immediately before cutover, then switch DNS while the old server remains live. That makes the DNS transition effectively invisible for most sites.

If you're talking about 30–100+ client sites, I'd favor a platform with automated migration + account provisioning over simply choosing the cheapest reseller plan. That operational tooling will save your studio considerably more time than a few dollars/month in hosting costs. www.20i.comwhmcspilot.com

For a growing design studio managing dozens of client sites, I’d pick InMotion Hosting—especially if your priority is making migrations painless rather than squeezing out the absolute lowest monthly price.

Why InMotion is the best fit

• Migration help is a major differentiator. InMotion explicitly offers reseller cPanel migrations with no downtime, and its migration team handles the transfer for you. www.inmotionhosting.com
• Proper WHM + separate cPanel accounts means each client site can be isolated and managed independently.
• White-label hosting lets your studio present hosting under your own brand. www.inmotionhosting.com
• WHMCS is available for automating provisioning, billing, and client management as your hosting operation grows. WHMCS itself supports automated account provisioning and cPanel synchronization. www.whmcs.com
• Forbes currently rates InMotion particularly highly for unlimited migrations, while noting that its reseller plans support 25–100 hosting accounts depending on tier. www.forbes.com

The important caveat about "zero downtime"

No host can magically guarantee zero downtime in every migration scenario. The safest approach is:

copy site → test on new server → lower DNS TTL → final sync → switch DNS → keep old server online

For cPanel-to-cPanel moves, cPanel's current Transfer Tool includes Live Transfer, specifically designed to reduce downtime while traffic is being moved. docs.cpanel.net

My shortlist

Bottom line: If you're at ~20–80 client sites and want your designers/developers spending their time on websites rather than server administration, InMotion is my first choice. Its combination of managed migrations, WHM/cPanel, white-labeling, backups, and support is unusually well aligned with an agency workflow. www.inmotionhosting.com

If you tell me roughly how many sites you have now (e.g. 30, 75, 150) and whether they're mostly WordPress, I can narrow this down to the specific reseller tier and compare the real monthly cost against Verpex/ScalaHosting.

For a growing design studio managing dozens of client websites, I’d shortlist two, with Cloudways as my first choice if most sites are WordPress/WooCommerce.

My pick: Cloudways Agency

Cloudways Agency Hosting

Why it fits a design studio:

• Managed migrations — Cloudways can handle migrations for you, rather than making your team move every site manually. Its current documentation says WordPress/WooCommerce migrations can be done free and with little to no downtime. support.cloudways.comwww.cloudways.com
• Unlimited migrations on the current Agency/Autonomous offerings, which is particularly useful when you're moving dozens of sites. support.cloudways.com
• Staging, cloning, backups and team access make it easier to maintain client sites after the migration. www.cloudways.com
• You can resell the hosting under your agency's service, rather than simply giving clients access to your infrastructure. www.cloudways.com
• You pay primarily for the underlying server resources rather than buying a separate traditional hosting account for every site, which can work well as your portfolio grows. www.cloudways.com

The important caveat: Cloudways isn't traditional cPanel/WHM reseller hosting. If your studio specifically wants WHM/cPanel accounts, client-level hosting packages, email hosting, and conventional reseller infrastructure, I'd choose 20i instead.

Best traditional reseller option: 20i

20i Reseller Hosting

20i has a particularly compelling migration workflow: its Migration Centre can automatically move files, databases and email accounts from cPanel/WHM, DirectAdmin, Plesk, FTP/SFTP and other platforms, with unlimited free migrations. It also supports WHMCS and automated provisioning. www.20i.com

That's a better fit if your studio wants to sell something like:

Website design + hosting + maintenance + email

as a standardized recurring package.

What I'd choose

For a design studio, I'd lean Cloudways unless you specifically need cPanel/WHM and email. Its combination of managed migrations, staging, backups, team access and agency-oriented management removes a lot of operational work as the client portfolio grows. support.cloudways.comwww.cloudways.com

One important point on “without downtime”: no migration platform can guarantee literally zero downtime for every site—especially sites with active orders, forms, memberships, or frequently changing databases. The safe workflow is to clone the site, test it, reduce DNS TTL ahead of the cutover, perform a final sync, then switch DNS. Cloudways' managed migration process is designed around that low-disruption approach. support.cloudways.comwww.cloudways.com

If you tell me roughly how many sites (e.g. 20, 50, 100), whether they're mostly WordPress, and whether you need client email, I can narrow it down to the best specific plan and estimated monthly cost.