Firma review (2026): is it worth paying for?
Pay-per-envelope e-signature API for SaaS products
Black Friday: is there a Firma sale?
Firma report card
Fair · out of 4.0 · graded Nov 13, 2026
Best for cheap pay-per-envelope signing in your own app
Firma.dev is an e-signature API charging EUR 0.049 per envelope with no minimum, no per-seat fees and unlimited teams. The test key is free with no card. It is only an API, with no end-user signing app, and priority support is an extra EUR 100 a month.
Who Firma is for
- Fits if you send low volumes from your own SaaS and want no monthly fee
- Works for developers who want webhooks and a TypeScript SDK
Who Firma is not for
- Not for you if you have no developer, as there is no signing app to open
- Watch out: prices are in euros and billed in your currency at the day's exchange rate
- Tight if you need fast support, because one-business-day priority support is EUR 100 a month extra
- Watch out: one envelope is one document however many signers or pages it has
Why Firma gets a 2.4
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- AValue for moneyEUR 0.049 an envelope with no minimum, so 100 envelopes cost under EUR 5, under 60% of the category's cheapest quarter.
- CFree plan and trialA testing-mode API key with unlimited test envelopes and no card, but real sending is paid.
- CFeaturesREST API, TypeScript SDK, embedded editors, webhooks, audit trail and unlimited teams. It does the API job and has no end-user app of its own.
- DEase of useNo store rating on record, and you write code against an API before anything is signed.
- BPlatforms and integrationsWeb and an API, with Zapier and n8n connectors listed.
What these grades rest on. Graded from this listing, whose facts were read from Firma.dev's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
Make Firma? Put this grade on your site
Paste this where you want the badge. It links here and follows the grade if it changes. About badges
<a href="https://toolgpa.com/tools/firma-dev#review"><img src="https://toolgpa.com/badge/firma-dev.svg" alt="Firma: 2.4 GPA on ToolGPA" width="196" height="56"></a>Where Firma stands among e-signature and proposal tools
Firma's GPA of 2.4 is higher than 58 of the 78 other e-signature and proposal tools we grade, and level with 11.
It stands best on value for money (A, above 76 of 78) and worst on ease of use (D, above 1).
Each grade against the category
Every bar is all 79 e-signature and proposal tools we grade, cut by the letter each got. Firma’s own letter is outlined.
- AValue for moneyAbove 76 of 78, level with 2
- CFree plan and trialAbove 32 of 78, level with 40
- CFeaturesAbove 1 of 78, level with 55
- DEase of useAbove 1 of 78, level with 1
- BPlatforms and integrationsAbove 12 of 78, level with 65
Keep Firma, or make your own?
Keep it
To replace Firma you would be making connections to other products, each kept working as those products change. That is not a weekend's work, with an AI app builder or without one.
It is one of the better ones too: its GPA of 2.4 is higher than 58 of the 78 other e-signature and proposal tools we grade.
What you could make
- Templates: an app builder makes this well.
What you could not
- Connections to other products, each kept working as those products change.
- An AI agent, with the models and the safeguards behind it.
What this rests on. Firma’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Firma?
Firma is an e-signature API aimed at software companies that want signing inside their own product. It offers a REST API, a TypeScript SDK, webhooks and embeddable template and signing editors that can be white-labeled. Billing is per envelope with no seat fees, and data is stored in the EU.
Worth knowing
- Prices are listed in euros and billed in your local currency at the current exchange rate, so the dollar amount varies.
- One envelope is one document sent for signature, however many signers or pages it has.
- Priority support with a one-business-day response is a separate €100 per month.
- It is an API product; there is no separate end-user signing app listed.
Key features
- REST API and TypeScript SDK
- Send documents from templates or uploaded PDFs, add recipients with roles, set signing order and deadlines, and download signed files and audit trails.
- Embedded editors
- Template and signing editors drop into your app as an iframe, with custom styling and white-label branding applied.
- Unlimited teams
- Each of your customers can have an isolated workspace with its own branding and webhook settings at no extra charge.
- Webhooks and event stream
- Events such as document sent, viewed, signed and complete are pushed as webhooks, and a server-sent event stream covers team activity.
- Audit trail and compliance
- Every signing request records views, field changes and signatures. The vendor says it aligns with ESIGN, UETA, eIDAS and GDPR.
- Zapier and n8n
- For no-code use the vendor says Firma connects to Zapier or n8n.
Firma pricing
As of Nov 13, 2026, Firma is a paid product with a free trial, starting at €0.049 per envelope, no minimum.
- Starts at
- €0.049 per envelope, no minimum
- Free plan
- None
- Free trial
- Free testing-mode API key with unlimited test envelopes, no card required
| Plan | Price | What you get |
|---|---|---|
| Pay as you go | €0.049per envelope, no minimum or contract | Flat rate at any volume, with unlimited teams, full API access and no per-seat fees. Priced in euros and billed in your currency. |
Read from firma.dev on Nov 13, 2026. Prices change, so confirm with Firma before you buy.
Works with
Firma alternatives
- Firma vs SignatureAPI
Free trial · from $25/mo
- Firma vs Anvil
Free plan · from $99/mo
- Firma vs eSignatures.io
Free trial · from $0.49
- Firma vs Documenso
Free plan · from $25/mo
- Firma vs DocuSeal
Free plan · from $20/mo
Common questions
Does Firma have an Android app?
No Android app was listed when its pages were read on Nov 13, 2026. Firma is listed for Web.
Does Firma have an iPhone app?
No iPhone app was listed when its pages were read on Nov 13, 2026. Firma is listed for Web.
Is Firma open source?
Firma is not described as open source on its own site, as read on Nov 13, 2026.
Does Firma have an API?
Yes. Firma offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 13, 2026.