Every Reddit thread and list the assistants cited, and where a founder reply fits

Co-founder of Firma.dev, so biased. On your two points: all our data is hosted in the EU (AWS Paris, CloudFront Stockholm), and the API is plain REST with an API key in the header, no OAuth dance. At 300 envelopes a month it would be about €14.70 (€0.049 each, no subscription). It covers eIDAS SES and AdES, so if any of your HR documents need a qualified signature you'd need a QES provider for those. One thing your compliance team will ask, so I'll say it up front: the data is in the EU, but if they also need an EU-registered vendor, check the company details on our legal page.

Late to this, but it still comes up when people search for cheap signing APIs. I'm one of the founders of Firma.dev, so weigh this accordingly. We built it for exactly this pricing problem: €0.049 per envelope, pay as you go, no monthly plan and no minimum. At 50 signatures a user a month that's about €2.45 per user. One envelope is one document, however many signers or pages it has. There's a free testing mode that works with real documents, so you can try the API and webhooks before paying anything. If you'd rather self host, Documenso and DocuSeal (both mentioned above) are the open source routes.

Co-founder of Firma.dev here, so take it with that in mind. We're an API built for this case: signing embedded in your app or sent by link, white label, webhooks, data hosted in the EU (AWS Paris), eIDAS SES and AdES, GDPR. Most teams get it integrated in under a day, and the testing mode is free with real documents, so you'll know quickly whether it holds up. Pricing is €0.049 per envelope with no subscription. I agree with the advice above: send a real contract through whatever you shortlist before you decide.

Co-founder of Firma.dev here, so biased, but this setup comes up a lot. From an Airtable script step you can call a plain REST API with fetch: create a signing request from a template with the client's name and email from the record, and the signer gets the email. Then register a webhook that points back at an Airtable automation, so the record updates when the document is completed. Pricing is €0.049 an envelope with no plan, which suits automation volume, and the testing mode is free with real documents. Whichever provider you pick, check whether the template can fill fields from your data or whether you generate the PDF yourself first.

Co-founder of Firma.dev here, so biased. If the API half matters most: we're an e-signature API where the signer just opens a link or signs inside your own app with no redirect, and webhooks tell you when the document is viewed, partially signed and completed, so the onboarding step can move on by itself. It's €0.049 an envelope with no subscription, and the testing mode is free with real documents. If you only send a handful of contracts and don't want to write any code, one of the no-code tools above is probably the simpler pick.

I work on an e-signature API, so I've been through this exact list. The weekend estimate holds for the mechanics. Two things that bite later and aren't covered above: keep the delivery record of the email that carried the signing link (message ID, timestamp, the address it went to) next to the audit trail, because it is part of how you show who signed. And store the final hash and the audit log somewhere your own app's admin can't edit, or the tamper check proves less than it looks. Not pitching anything, he clearly wants to own it. Good luck with the build.

Hi Richard, I'm Chris, co-founder of Firma.dev. Your best e-signature software guide is the page ChatGPT cited in all three of the embedded signing questions I checked. It reviews apps people sign in directly, so we don't fit it as it stands: we're an API that SaaS products build signing into. If you ever add a section on e-signature APIs for developers, I'd be glad to give you a full test account and walk you through it.

Hi, I'm Chris, co-founder of Firma.dev. Your list of e-signature APIs for developers came up when I checked what AI assistants cite for embedded signing questions. We're an API built for SaaS products: embedded and white-labeled signing, webhooks, a workspace per customer, €0.049 per envelope with no subscription, data hosted in the EU. If you update the list, we'd be glad to be considered, and I can set you up with a test account so you can try it yourself.

Hi, I'm Chris, co-founder of Firma.dev. Your Top 21 e-signature APIs for digital onboarding came up in AI answers for embedded signing questions. We're an e-signature API for SaaS products (embedded and white-labeled signing, webhooks, €0.049 per envelope, data hosted in the EU). If you refresh the list, we'd be glad to be considered. Happy to share anything you need to check.

Not a reply but a listing: G2's E-Signature APIs small business category has 11 listings and Firma.dev is not one of them. G2 has an "Add Your Product" route in its footer. Once listed, a few reviews from customers you already work with would give Perplexity something to cite, since it pulled this page for the German HR question.

Hi Adrian, I'm Chris, co-founder of Firma.dev, an e-signature API for SaaS products. I read your European e-signature comparison and your EU-based only rule, so I want to be straight about how we fit before asking: all our data is hosted in the EU (AWS Paris, CloudFront Stockholm) and we cover eIDAS SES and AdES, but please check the company details on our legal page against your criteria. If we qualify, we'd love to be considered for the developer and API angle; if not, no hard feelings.

Hi, I'm Chris, co-founder of Firma.dev. I read your piece on choosing an eSignature solution; it came up when I checked what AI assistants cite for embedded signing questions. If you update it, Firma.dev may be useful for the SaaS embedding case: white-labeled embedded signing, a workspace per customer, €0.049 per envelope with no subscription, data hosted in the EU. Glad to answer anything or set your team up with a test account.

Hi Mariia, I'm Chris, co-founder of Firma.dev. Your e-signature roundup came up when I checked what AI assistants cite for embedded signing questions. It's written for teams choosing signing software, so we may not fit as it stands: we're an API for SaaS products that want signing inside their own app. If you ever add a section for developers or SaaS builders, we'd be glad to help with facts: €0.049 per envelope, no subscription, data hosted in the EU. Happy to set you up with a test account.

Hi Steve, I'm Chris, co-founder of Firma.dev. Your best eSign software roundup came up in ChatGPT's answer for an EU HR team that wants contracts signed inside its own app. Your list covers apps people sign in directly, so we may not fit as it stands: we're an API that SaaS products build signing into. If you ever cover e-signature APIs for developers, I'd be glad to give you a full test account and any numbers you want to check.

Hi, I'm Chris, co-founder of Firma.dev, an e-signature API for SaaS products (€0.049 per envelope, data hosted in the EU). Your SaaS digital signature category came up in AI answers for embedded signing questions. How do we get a listing in that category? Happy to fill in whatever you need.