Using CodeTwo Email Signatures 365 and looking to switch — over data residency, billing currency, licence minimums, or server-side architecture? This page lists the alternatives available, not just ATOM, and walks through the migration to ATOM Signatures step by step. You'll also find, honestly, what you give up by leaving CodeTwo.
Why leave CodeTwo?
For the 10-license minimum, billing in US dollars, hosting outside Canada by default, the hybrid architecture and the marketing features:
- A 10-licence minimum, which penalizes small teams or ones growing gradually.
- Billing in US dollars, tiered, subject to currency conversion and its variability.
- Hosting outside Canada by default: a Canadian Azure region can be chosen, but it isn't the default configuration, and the vendor remains a company based in Europe.
- Hybrid architecture: in server-side mode, the email is routed through CodeTwo's Azure services before being delivered.
- Marketing features (advanced conditional logic, feature tiers) that most organizations never use, but which add pricing tiers and configuration.
Alternatives to CodeTwo
- ATOM Signatures — 100% Canadian hosting, a client-side-only Outlook add-in (the email never leaves Microsoft 365), a native FR-CA/EN-CA interface, targeting by Microsoft 365 groups, users and shared mailboxes, and a single price of CAD $1 per user per month, with no licence minimum. Fits Canadian organizations subject to PIPEDA, Law 25, or an equivalent provincial law. Discover ATOM Signatures.
- Exclaimer — a broader marketing suite (banners, campaigns, analytics, CRM integrations, multi-brand management), server-side, client-side, or both architectures, tiered USD billing with a 10-user minimum. Fits organizations that primarily need CRM integrations or multi-brand management, and for whom Canadian data residency is not a criterion. ATOM vs Exclaimer comparison.
- Letsignit — a French platform with a client-side add-in and, optionally, server-side methods (SMTP connector, Outlook on the Web API), digital business cards (vCards), and PowerPoint presentation management (Slides), 100% European hosting. Fits organizations whose priority is a marketing campaign platform with vCards and governed presentations, if European hosting isn't a blocker. ATOM vs Letsignit comparison.
- Signitic — a French platform with a free plan for up to 19 users (Signitic branding visible), then a paid tier starting at €1 per user per month with a 20-licence minimum, 100% European hosting, also covering Gmail, Google Workspace, and Zoho Mail alongside Microsoft 365. Fits a small European team that prioritizes the lowest price, with no data residency constraint. ATOM vs Signitic comparison.
- WiseStamp — a New York-based platform deployable client-side (Outlook add-in, Chrome extension), server-side or hybrid, with an AI designer, banner campaigns and tiers (Basic, Grow, Platform, Enterprise) billed from $19 per month plus $1 per employee per month. Suits a multi-brand organization, or one also on Google Workspace, that values SOC 2 Type II and ISO 27001 certifications and for which Canadian hosting is not a requirement. ATOM vs WiseStamp comparison.
- Rocketseed — a vendor whose offer relies solely on server-side deployment (Microsoft 365, Google Workspace, Exchange), with no add-in to install, a public price grid starting at 50 employees, a one-time setup fee and 24/7 support with a dedicated account manager. Suits an organization of 50 employees or more that wants a turnkey setup and accepts that its outgoing email goes through the vendor's service. ATOM vs Rocketseed comparison.
- Opensense — a San Francisco platform deployable server-side, through an Outlook add-in or via the Gmail API, with banners, email tracking and integrations (directory, HR, CRM), priced from $1 to $5 per user per month with a $500 monthly minimum; data hosted in the United States by default, optional residency in Europe, Asia or Australia, SOC 2 Type II attestation. Suits a large organization that can absorb the monthly minimum, wants to link signature, email tracking and CRM, and for which US hosting is acceptable. ATOM vs Opensense comparison.
- Terminus — email signature marketing (Sigstr) built into an account-based marketing (ABM) platform, with banners that are dynamic by sender, recipient and lifecycle stage; Terminus merged into DemandScience in November 2024 and its signature product pages now redirect to DemandScience's site, with no public price. Suits a B2B marketing team that mainly wants an advertising channel in its employees' emails; confirm with the vendor that the offer is still sold on its own. ATOM vs Terminus comparison.
- Microsoft 365's native signature and Exchange transport rules — free and already included in the subscription: the local Outlook signature (set by each user, with no central control) and the Exchange transport rule (applied by the server, but missing from Sent Items, with unreliable images and no fine-grained group targeting). Fits a small team satisfied with a single, static signature, with no logo or per-department targeting. ATOM vs native signature comparison.
Switching from CodeTwo to ATOM, step by step
- Take stock of the signature templates and targeting used in CodeTwo.
- Connect your Microsoft 365 tenant to ATOM (administrator consent, read-only directory access).
- Recreate your signatures: use "Import HTML" to bring in your templates, then replace CodeTwo's dynamic fields with ATOM tokens (name, title, phone…).
- Reproduce your targeting: Microsoft 365 groups, individual users, and shared mailboxes.
- Deploy the ATOM add-in from the Microsoft 365 admin center, using the manifest URL generated in the Connections tab (up to 24 hours to propagate).
- Remove CodeTwo at cutover: uninstall its add-in and, if you were using its server-side mode, delete the connector and transport rule it created in Exchange Online, per CodeTwo's documentation, to avoid duplicate signatures.
- Check the rendering on a few accounts (web, desktop, mobile) before cancelling CodeTwo.
What do you give up by leaving CodeTwo?
CodeTwo covers needs that ATOM doesn't: advanced conditional logic inside the templates themselves (ATOM picks the signature by internal or external recipient and by language, but has no conditional blocks within a template), a hybrid architecture that allows a server-side relay (Azure) alongside the client-side add-in, and the option to choose an Azure region, including Canada, on request. An organization that actively uses these features loses a real tool by migrating to ATOM, which does not offer them.
Comparing CodeTwo and ATOM in detail
For a detailed, criterion-by-criterion comparison — hosting, architecture, price, targeting, platforms — see the ATOM vs CodeTwo comparison, with a full table and a verdict for Canadian organizations.
Frequently asked questions
Can I bring my CodeTwo templates into ATOM?
Yes. ATOM's visual editor offers "Import HTML," which lets you paste the code of your existing CodeTwo templates, then replace CodeTwo's dynamic fields with ATOM tokens (name, title, phone…) fed by Microsoft Graph.
Do I need to remove CodeTwo before installing ATOM?
It's recommended to remove the CodeTwo add-in — and, in server-side mode, its connector and transport rule in Exchange Online — at cutover to ATOM, to avoid two signatures being added to the same email.
How long does switching to ATOM take?
Connecting the tenant, recreating templates, and targeting take a few hours. Deploying the add-in from the Microsoft 365 admin center can then take up to 24 hours to propagate to all devices, according to Microsoft.
What other alternatives to CodeTwo exist?
Besides ATOM Signatures, organizations also evaluate Exclaimer, Letsignit, Signitic, or Microsoft 365's native signature with Exchange transport rules, depending on their priorities around marketing features, data residency, or budget.
Replace CodeTwo with a Canadian solution. ATOM Signatures manages your Outlook signatures client-side, with 100% Canadian hosting, Canadian-dollar billing, and no licence minimum.
The product in detail: Office 365 email signature management with ATOM.
Sources
- CodeTwo Email Signatures 365 — official pricing — codetwo.com/email-signatures/pricing
- CodeTwo Email Signatures 365 — overview and architecture — codetwo.com
Provided for information purposes; CodeTwo's prices, minimums and hosting regions may change — verify official sources. ATOM Solutions is not affiliated with CodeTwo. This article does not constitute legal advice.