CodeTwo vs Cloudiway: Migration Tool Comparison

You're picking between CodeTwo and Cloudiway for a Microsoft 365 migration project. Both are mature European ISVs. Both license per source mailbox. Both will get the job done. The difference is what they were designed around. CodeTwo grew out of Exchange tooling and signature management; the migration product reflects that lineage. Cloudiway was built migration-first and goes deep on source breadth and content modules. Picking the wrong one mid-project costs real money, so this is the engineering-level breakdown.

What each product actually is#

CodeTwo is a Polish ISV best known for Exchange signature management, used by tens of thousands of organisations to deploy server-side email signatures. They built migration products on top of that core — CodeTwo Office 365 Migration and CodeTwo Exchange Migration — that share the same operating heritage. The full portfolio also includes backup and admin tools.

Cloudiway is a French ISV focused entirely on migration. Their product spans mail, SharePoint, OneDrive, Teams, Google Drive, and Google Sites, with separate but integrated modules for each. They cover a wider list of source platforms than most competitors, including legacy systems like Notes/Domino, GroupWise, Zimbra, and HCL Verse.

Both are SaaS. Both license per source mailbox. Neither runs offline or as a desktop tool.

Source coverage#

This is where the two products differ most clearly.

CodeTwo supported sources#

CodeTwo's migration tools support Exchange (2007 and later) and Microsoft 365 tenants as primary sources. Generic IMAP is supported but the experience is noticeably less polished — features like granular folder mapping, throttling controls, and incremental delta sync are more developed for Exchange sources than for IMAP. Google Workspace migration exists but isn't where the product's strength lies.

Cloudiway supported sources#

Cloudiway's source list is one of the widest in the market: Microsoft 365, Exchange (2010 and later), Google Workspace (mail, calendar, contacts, Drive, Sites), Lotus Notes/Domino, GroupWise, Zimbra, HCL Verse, Kerio, IceWarp, and generic IMAP. Each source has dedicated handling rather than a thin IMAP shim. They also handle SharePoint and Teams as separate destinations and sources.

Tenant-to-tenant Microsoft 365#

Cross-tenant Microsoft 365 migrations are a common project shape post-acquisition or post-divestiture. Both products handle this scenario, but with different strengths.

Cloudiway has deeper tenant-to-tenant tooling. The platform handles identity remapping, content migration (SharePoint, OneDrive, Teams) alongside mail, and the various edge cases that come up when you're consolidating two Microsoft 365 estates into one. Granular throttling controls help when you're competing with other tools for tenant API allowance.

CodeTwo also covers tenant-to-tenant but is more often the pick when the scope is primarily mailboxes plus public folders, with content migration handled separately or not at all. Hybrid coexistence and free/busy during the migration window are handled cleanly.

If your project includes "and migrate the SharePoint sites and Teams chats too", Cloudiway will cause less pain. If it's mailboxes plus signatures plus a clean cutover, CodeTwo is at home.

Signature management and post-migration#

This is CodeTwo's structural advantage. After the migration, you almost always need to deal with email signatures — new branding, new disclaimers, new policies. CodeTwo Email Signatures is one of the most widely deployed signature management platforms for Microsoft 365 and Exchange. Buying CodeTwo for migration and keeping the signature product afterward is a clean single-vendor story.

Cloudiway does not sell signature management. They are a pure migration vendor — once the cutover is done, you move on to a different tool for post-migration management.

This is a business model difference more than a tooling weakness. Both approaches are defensible.

Throttling, concurrency, performance#

Both products hit identical Microsoft throttling ceilings on the destination side. The difference is what the operator can do about it.

Cloudiway exposes more granular tuning: per-endpoint thread counts, per-mailbox concurrency, retry intervals, pause windows for business hours, and explicit handling of 429 TooManyRequests and ErrorServerBusy responses. Useful when you're sharing destination tenant capacity with a backup tool or running multiple parallel projects.

CodeTwo implements backoff and retry but the throttling controls in the UI are less granular. You can set the maximum number of mailboxes processed in parallel and a few high-level parameters, but tuning per-mailbox concurrency is more limited. For most projects this is fine; for large enterprise cutovers where every hour matters, Cloudiway's wider tuning surface is genuinely useful.

Expect 90–120 minutes per mailbox of average size (10–25 GB) on either platform when throttling headroom is clean. Both run multiple mailboxes in parallel, so a 200-user project commonly fits in a long weekend.

SharePoint, OneDrive, and Teams#

If "and migrate the content too" is part of your scope, Cloudiway is the clear pick.

Cloudiway sells SharePoint, OneDrive, Teams, and Google Drive migration as separate modules that integrate with the mail migration. The Teams module handles channels, tabs, and (within Microsoft's API limits) chat history. Google Drive migration preserves sharing permissions where the destination supports them. SharePoint migration handles document libraries, lists, custom permissions, and site structure.

CodeTwo offers SharePoint and OneDrive migration through their broader product suite, but it's not as mature as the email side. Teams migration is supported but with more limitations on chat history and channel structure.

For pure email and signature work, CodeTwo is at parity or ahead. For multi-content migrations, Cloudiway is built for it.

At-a-glance comparison#

Honest weaknesses#

CodeTwo weaknesses. Source coverage outside Microsoft and Exchange is thin. The product assumes you are migrating to Microsoft 365 — if your destination is anything else, look elsewhere. Larger projects can hit performance ceilings that aren't always obvious from the UI. Content migration (SharePoint, OneDrive, Teams) is functional but less developed than the email side. If your project genuinely needs broad source coverage, the IMAP shim won't be enough.

Cloudiway weaknesses. UI is engineering-driven — more knobs to configure and more places to mistune. Documentation is comprehensive but assumes Exchange and migration literacy. Customer-facing reporting and exports are functional but less polished than CodeTwo's. No signature management, no backup product — once the migration is done, you're moving to a different vendor for ongoing tooling. Support is responsive but smaller-team feel.

When to pick which#

Three questions usually decide it.

1. What's your source?

• Exchange on-prem or Microsoft 365 tenant only: either works
• Notes, GroupWise, Zimbra, HCL Verse, Kerio, IceWarp: Cloudiway
• Google Workspace with Drive content: Cloudiway

2. What's the scope beyond mail?

• Mail plus SharePoint, OneDrive, Teams content: Cloudiway
• Mail only, plus signature standardisation afterward: CodeTwo
• Hybrid Exchange coexistence during a long cutover: CodeTwo

3. What's the post-migration story?

• Signature management bundled with the same vendor: CodeTwo
• Migration only, ongoing tools picked separately: Cloudiway

For broader market context, the best email migration tools 2026 roundup places both alongside BitTitan and SkyKick. The BitTitan vs CodeTwo and SkyKick vs Cloudiway comparisons cover the other heavyweight pairs in the same bracket.

When neither fits#

Both CodeTwo and Cloudiway are sized for Exchange-class migrations: dozens to hundreds of mailboxes, real budget, proper change management. If your actual situation is "move 6 IMAP mailboxes from a hosting provider to Fastmail this weekend", both are heavily over-specified and over-priced.

That smaller bracket is what Mailbox Taxi covers. It runs locally on Windows, Mac, or Linux. No SaaS console, no per-mailbox license burn, no cloud workers handling your client's mail — credentials stay on your machine. For IMAP-to-IMAP cutovers across providers like Gmail, Outlook, Yahoo, iCloud, Zoho, Fastmail, ProtonMail Bridge, and custom IMAP servers, it's usually the right shape of tool.

If your project is heavyweight Microsoft 365 work with content migration or signature standardisation, pick between CodeTwo and Cloudiway using the rules above. If it's closer to a clean IMAP cutover, Mailbox Taxi vs CodeTwo and Mailbox Taxi vs Cloudiway cover the alternative.