The Firma Insider’s Guide
Everything we know about Firma in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
Firma
The Insider’s Guide
Pay-per-envelope e-signature API for SaaS products
Every plan, grade, refund rule and rival among e-signature and proposal tools, read from Firma’s own pages.
Made by Firma.dev · checked Nov 13, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from Firma’s own pages, its app-store listings and our grades. Every fact in it is on Firma’s page too, where it is kept up to date. Checked Nov 13, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.4
GPA, above 58 of the 78 other e-signature and proposal tools we grade
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.
To get you started, here are 9 things to know about Firma, taken from its own pages and our grades.
No store rating on record, and you write code against an API before anything is signed.
- 1
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.
- 2
What it costs
Paid plans start at €0.049 per envelope, no minimum.
- 3
You can try it first
Free testing-mode API key with unlimited test envelopes, no card required
- 4
It runs on Web
Web.
- 5
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.
- 6
Embedded editors
Template and signing editors drop into your app as an iframe, with custom styling and white-label branding applied.
- 7
Unlimited teams
Each of your customers can have an isolated workspace with its own branding and webhook settings at no extra charge.
- 8
A 2.4 GPA, above 58 of 78
That is against the other e-signature and proposal tools we grade, on value, the free plan, features, ease of use and platforms.
- 9
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.
Firma at a glance
- Pricing
- Free trial, from €0.049 per envelope, no minimum
- Free plan
- No
- Free trial
- Free testing-mode API key with unlimited test envelopes, no card required
- Runs on
- Web
- Made by
- Firma.dev
- Category
- E-Signatures & Proposals
- Our grade
- 2.4 GPA, fair
The report card
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.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | A | EUR 0.049 an envelope with no minimum, so 100 envelopes cost under EUR 5, under 60% of the category's cheapest quarter. |
| Free plan and trial | C | A testing-mode API key with unlimited test envelopes and no card, but real sending is paid. |
| Features | C | REST 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. |
| Ease of use | D | No store rating on record, and you write code against an API before anything is signed. |
| Platforms and integrations | B | Web and an API, with Zapier and n8n connectors listed. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
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 it 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
Good to know
Good for
- SaaS teams that want white-labeled signing for their own customers
- Low-volume senders who do not want a monthly minimum
- Teams that need EU-only data storage
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.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
€0.049
To start
Firma is a paid product with a free trial, starting at €0.049 per envelope, no minimum.
A testing-mode API key with unlimited test envelopes and no card, but real sending is paid.
Pay as you go
€0.049
per 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.
Trying it first
Free testing-mode API key with unlimited test envelopes, no card required
Read from firma.dev on Nov 13, 2026.
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
1
Place it runs: Web
Pay-per-envelope e-signature API for SaaS products. Here is what it does, as its own site describes it, and what it covers: public API, templates, workflow automation, AI agents.
REST API, TypeScript SDK, embedded editors, webhooks, audit trail and unlimited teams.
- 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.
Where it runs
- Web
What it works with
- Zapier
- n8n
Firma is made by Firma.dev.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
58/78
Other e-signature and proposal tools it is graded above
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
- CFree plan and trialAbove 32 of 78
- CFeaturesAbove 1 of 78
- DEase of useAbove 1 of 78
- BPlatforms and integrationsAbove 12 of 78
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
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.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
SignatureAPI, Anvil, eSignatures.io, Documenso and DocuSeal
The 5 tools Firma is most often weighed against, with where each one differs from it.
- 2.0GPA
SignatureAPI
Free trial · from $25/mo
- 2.2GPA
Anvil
Free plan · from $99/mo
Document automation and e-signature APIs for developers.
- Anvil has a free plan. Firma does not, though it has a free trial.
- Firma also covers AI agents.
- Anvil also covers forms.
- 2.0GPA
eSignatures.io
Free trial · from $0.49
Pay-per-contract e-signatures with an API and no monthly fee.
- Firma also covers AI agents.
- eSignatures.io also covers documents.
- 2.2GPA
Documenso
Free plan · from $25/mo
Open-source document signing, hosted or on your own servers.
- Documenso has a free plan. Firma does not, though it has a free trial.
- Documenso is open source and self-hostable, according to its own site.
- Firma also covers workflow automation and AI agents.
- 2.4GPA
DocuSeal
Free plan · from $20/mo
Open-source document signing, in the cloud or on your servers.
- DocuSeal has a free plan. Firma does not, though it has a free trial.
- DocuSeal is open source and self-hostable, according to its own site.
- Firma also covers workflow automation and AI agents.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
12
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is Firma free?
No, Firma is a paid product, but you can try it first. Free testing-mode API key with unlimited test envelopes, no card required.
How much does Firma cost?
Firma lists one plan. Pay as you go: €0.049 per envelope, no minimum or contract.
What platforms does Firma work on?
Firma is available on Web.
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.
What does Firma integrate with?
Firma's listing names Zapier and n8n. A listing names up to eight integrations, so it may connect to more.
Who makes Firma?
Firma is made by Firma.dev.
What are the alternatives to Firma?
The closest alternatives to Firma in our directory are SignatureAPI, Anvil, eSignatures.io, Documenso and DocuSeal.
How does Firma compare with other 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.
Could I make my own version of Firma?
To replace Firma you would be making connections to other products, each kept working as those products change.
Where this guide comes from
The prices, plans, platforms and features were read from Firma’s own pages on Nov 13, 2026, and the grades were given on Nov 13, 2026. 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.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Firma.dev. Prices change, so check firma.dev before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
7,721
Tools graded, in 95 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
7,721
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- Firma, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/firma-dev
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "Firma: The Insider's Guide", checked Nov 13, 2026. https://toolgpa.com/tools/firma-dev
Know someone choosing between e-signature and proposal tools?
Send them this guide: toolgpa.com/tools/firma-dev/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded e-signature and proposal tools after Firma, each with an Insider's Guide of its own.
- E-Signatures & Proposals Insider's GuideEvery one of the 79 e-signature and proposal tools we grade, compared
- BoldSign Insider's GuideLow-cost e-signature app and API from Syncfusion3.0 GPA
- Zoho Sign Insider's GuidePer-user e-signature app from Zoho with a free single-user plan3.0 GPA
- Docusign Insider's GuideE-signature service for sending, signing and tracking agreements2.6 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what Firma’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Firma is a trademark of its owner, and this guide is not made, paid for or approved by Firma.dev. Prices and plans change: check firma.dev before you buy.