Letsignit is a French email signature management platform, with an Outlook add-in deployed from the Microsoft 365 admin center and a broad marketing feature set (banners, campaigns, vCards, presentations). ATOM Signatures covers a narrower, deliberate scope: applying the right signature, hosted in Canada, to every person in a Canadian organization. This comparison puts both products side by side, criterion by criterion. For the reasons an organization leaves Letsignit, see our Letsignit alternative page — this one is a technical head-to-head.
Comparison table: ATOM Signatures against Letsignit
Both solutions manage Microsoft 365 signatures centrally, with no per-workstation install. Here are the differences that matter to a Canadian organization.
| Criterion | ATOM Signatures | Letsignit |
|---|---|---|
| Data hosting | Canada | 100% Europe; no published Canadian region |
| Legal framework targeted | Built for the Canadian context (PIPEDA, provincial laws) | Not targeted (European market, GDPR) |
| Architecture | Client-side only, no installation | Client-side add-in + optional server-side SMTP connector and OWA API |
| Pricing | CAD $1 / user / month, all-inclusive | From $2 / user / month, annual billing, per offer |
| License minimum | None | None published |
| Free trial | 7 days | Not stated on the pricing page |
| Languages | Native bilingual FR-CA / EN-CA | Multilingual, French company |
| Marketing (banners, vCards, presentations) | No (focused on the signature) | Yes — Signatures & vCards, Slides and Platform offers |
| Published certifications | None claimed | ISO 27001, ISO 27018 |
| Outlook platforms | Windows, web, Mac, mobile iOS/Android | Windows, web, Mac, mobile |
Letsignit's pricing and plans change; always check its official pricing page before deciding.
Architecture: where email is routed
Letsignit primarily works through a client-side Outlook add-in, deployed with no installation from the Microsoft 365 admin center and synced to the directory (Azure AD). But for scenarios the add-in alone does not cover, the company documents other deployment methods: an API for Outlook on the Web, an app for Outlook Windows, and a server-side SMTP connector. An organization that enables that connector routes email through Letsignit's infrastructure to receive its signature.
ATOM Signatures offers no server-side method at all: an event-based Outlook add-in inserts the signature at compose time, within Microsoft 365, with no third-party server relaying the message. This is the same architecture across every Outlook platform (Windows, web, Mac, mobile). This choice is detailed in our guide on architecture without routing.
Data residency: Canada or Europe
Letsignit advertises "100% EU" hosting, backed by ISO 27001 and ISO 27018 certifications. Its official documentation publishes no Canadian region: data therefore resides in Europe, even though its pricing page lets you display amounts in Canadian dollars purely as a display convenience.
ATOM Signatures hosts all configuration data in Canada. Because insertion happens client-side, the content of emails themselves never passes through a signature server, in Canada or anywhere else.
For a Canadian organization, the applicable legal framework depends on sector and province: the private sector generally falls under PIPEDA (federal law), some provinces have their own statute — Law 25 in Quebec is one example, PIPA applies in Alberta and British Columbia, sector-specific laws such as PHIPA govern health information in Ontario — and several public bodies must follow rules specific to their province, some of which favor or require storage in Canada. See our guides on Canadian data hosting and email data sovereignty.
This article does not constitute legal advice. To assess your situation, consult a legal advisor, the Office of the Privacy Commissioner of Canada (priv.gc.ca) or, in Quebec, the Commission d'accès à l'information (cai.gouv.qc.ca).
Pricing and currency
Letsignit lists its plans starting at $2 per user per month, billed annually, split across three offers: Signatures & vCards, Slides (PowerPoint management), and Platform, which combines both. Its pricing page offers a currency selector (USD, CAD, EUR, GBP) and publishes no license minimum for these three offers; the Enterprise tier is negotiated on request.
ATOM Signatures applies a single flat rate: CAD $1 per user per month, all features included, with no tier or minimum, plus a 7-day free trial. For a Canadian organization, the comparison should account for two often-overlooked points: the CAD price shown is just a display setting — the company, its infrastructure and its support remain based in France — and the split by offer, which separates signature management from presentation management.
The Letsignit prices cited come from its public page and may change; always confirm at the source.
When to choose Letsignit, when to choose ATOM
Choose Letsignit if…
- Your priority is a signature marketing campaign platform, with digital business cards (vCards) and centralized governance of PowerPoint presentations.
- You need a server-side deployment method (SMTP connector) for a specific scenario the Outlook add-in does not cover.
- Hosting in Europe is not a constraint for your organization.
Choose ATOM Signatures if…
- You are a Canadian organization — an SMB, professional firm, municipality, public body, healthcare provider, school or MSP — for whom Canadian hosting matters.
- You want a strictly client-side architecture, with no server-side option, across every Outlook platform including mobile.
- You prefer a product and support that are bilingual FR-CA / EN-CA, on Canadian time zones.
- You want a single, predictable price in Canadian dollars, with no tier or license minimum.
To widen the comparison, see our analysis of the best email signature software in Canada and the ATOM vs CodeTwo comparison.
Frequently asked questions
Do Letsignit and ATOM Signatures use the same architecture?
No. Letsignit combines a client-side Outlook add-in with, optionally, other server-side deployment methods (an SMTP connector, an API for Outlook on the Web) depending on the configuration used. ATOM Signatures works exclusively client-side: an event-based Outlook add-in inserts the signature at compose time, with no third-party server relaying the email.
Where does Letsignit host data?
Letsignit advertises 100% hosting in Europe, with ISO 27001 and 27018 certifications, and publishes no Canadian region in its official documentation. ATOM Signatures hosts all data in Canada and never routes email content outside Microsoft 365.
How much does Letsignit cost compared to ATOM Signatures?
Letsignit lists its plans starting at $2 per user per month, billed annually, split across the Signatures & vCards, Slides and combined Platform offers. ATOM Signatures applies a single flat rate of CAD $1 per user per month, all features included, with no tier or license minimum.
Can we migrate from Letsignit to ATOM without disrupting email?
Yes. ATOM is configured at the Microsoft 365 tenant level and works client-side: switching requires no change to email routing or existing connectors. You recreate your templates in the visual editor, target by group or shared mailbox, then remove Letsignit's old add-in and any server-side deployment methods.
A signature hosted in Canada, with no email routing, at CAD $1 all-inclusive. ATOM Signatures automatically applies the right signature in Outlook, client-side, with 100% Canadian hosting and bilingual support.
Also useful: the alternative to Letsignit and the ATOM vs Exclaimer comparison.
Sources
- Letsignit pricing — letsignit.com/pricing
- Letsignit hosting and certifications — letsignit.com
- Letsignit Outlook add-in — letsignit.com/addin-microsoft-office-365
- Office of the Privacy Commissioner of Canada — priv.gc.ca
- Commission d'accès à l'information du Québec — cai.gouv.qc.ca
Letsignit's prices, plans and features are indicated for reference based on its public pages at the time of writing and may change. ATOM Solutions is not affiliated with Letsignit. This article does not constitute legal advice.