Alternatives

Products that do what Signbee does

Document signing for AI agents

1SA
Signbee – An API that lets AI agents send documents for signature▲7
Hi HN, I built Signbee while working on AI agents that handle contracting workflows. The agents could draft agreements, negotiate terms, manage deals — but the moment a signature was needed, the workflow broke. It always ended with "please upload this to DocuSign" — which meant human intervention, account setup, and manual uploads. So I built a simple API. You POST markdown and Signbee generates the PDF, or you pass a URL to your own PDF if you already have one designed the way you want it. No templates, no editor. Either way, it verifies both parties via email OTP and produces a signed…
Mar 2026 · signb.ee
2
Single Player Mode▲389
Sign documents for free, with or without an account
2023
3
Papermark AI▲434
Open-source AI document assistant
2023
4
SignHouse▲244
Create an electronic signature: legally binding and free
2023
5
Firma.dev▲325
E-signatures API for your app averaging ~3¢ per envelope
Jun 2026 · firma.dev
6
SignWell▲396
Get documents signed quickly, securely & legally
2024
7
Paperless.io▲286
Boost productivity with document automation & e-signatures
2022
8
DocEndorse AI Agent for Microsoft Teams▲69
Autonomous AI for smarter e-signatures
Dec 2025
9
AI Signature Generator▲94
Effortlessly create your perfect digital signature
2024
10
Legitt e-Signature▲150
AI-native eSign with Contract Intelligence built in
2024
11
BillingBee.co▲8
From proposal to payment — powered by AI. Free to start.
Jul 2026 · billingbee.co
12AE
Agent.email – sign up via curl, claim with a human OTP▲99
Hi HN! We're Haakam, Michael, and Adi from AgentMail- a ycs25 company. We give AI agents their own email inboxes. Recently, we ran an experiment called Agent.Email. It's a signup flow designed specifically for AI agents instead of humans. The inspiration came from a few comments we received when we did our seed launch a few months back. They all came from the very apt observation that agents not being able to sign up to a product made for agents without human credentials was ironic and unideal. This is basically the thesis we built AgentMail on: The internet was made for humans exclusively,…
May 2026
13
Trustbot for NDAs▲77
Faster, better NDA handling for teams with free e-signing
2019
14
LexFlow▲65
Create, understand, and sign contracts
Nov 2025
15
SignBolt▲2
Sign PDFs in seconds, without the DocuSign tax
Jun 2026 · signbolt.au
16SE
SignatureAPI – Electronic Signature API▲22
Hey HN! Victor here from SignatureAPI (https://signatureapi.com) SignatureAPI is an electronic signature platform via API. Our customers use SignatureAPI to add electronic signatures to their apps and workflows. SignatureAPI was born out of the frustration of a friend of mine who needed to integrate electronic signatures into his app, but found Docusign API, at $1+ per envelope, too expensive for his use case. We quickly realized that many others shared this same frustration. We are different from other platforms such as Docusign, Dropbox Sign, Adobe Sign, etc in two key ways: 1.…
2024 · signatureapi.com
17
UseAIWriter▲2
Free AI business document writer - No signup required
Jun 2026 · useaiwriter.com
18
SignWorkflow
AI-powered eSignature & document workflow automation
Jul 2026 · signworkflow.com
19
Formaloo Sign - eSignature forms & docs▲26
Customize free contract templates with secure eSignatures
2024
20OS
Open-Source DocuSign Alternative▲16
2023 · opensignlabs.com
21
SignFile▲4
Sign anything. One flat price. No per-doc, no sales call.
Jul 2026 · signfile.io
22
Online Signature Generator by FDM AI▲4
Draw professional e-signatures with a smooth artistic pad
May 2026 · freedocumentmaker.com
23
Turn any contract into a signed deal▲3
AI reads your contracts, fills fields, and gets them signed
Jun 2026
24
MamaSign▲4
AI-Powered e-Signatures, Custom Branding & Invoicing
Mar 2026

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