AI · alternatives · 2026
24 alternatives to AgentSign
Zero trust identity & signing for AI agents
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
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Hi HN, I built Agent Passport, an open-source identity verification layer for AI agents. Think "Sign in with Google, but for Agents." The problem: AI agents are everywhere now (OpenClaw has 180K+ GitHub stars, Moltbook had 2.3M agent accounts), but there's no standard way for agents to prove their identity. Malicious agents can impersonate others, and skill/plugin marketplaces have no auth layer. Cisco's security team already found data exfiltration in third-party agent skills. Agent Passport solves this with: - Ed25519 challenge-response authentication (private keys never leave the…
Feb 2026 · agent-passport-red.vercel.app · its alternatives →
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Agentfield▲91Build & scale AI \ agents as microservices with IAM
Dec 2025 · agentfield.ai · its alternatives →
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- 4AE
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 · its alternatives →
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Identity and trust for AI agents — verify, revoke, enforce
Mar 2026 · agentspassports.com · its alternatives →
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HelixID▲34Open-source identity & trust layer for AI agents
Sep 2026 · helixid.dev · its alternatives →
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NervePay▲74Give AI agents identity, secrets vault & analytics
Feb 2026 · nervepay.xyz · its alternatives →
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Token efficient IDs for AI agents. UUID alternative for the agentic era. - vostride/id-agent
May 2026 · github.com · its alternatives →
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Much of my work right now involves complex, long-running, multi-agentic teams of agents. I kept running into the same problem: “How do I keep these guys in line?” Rules weren’t cutting it, and we needed a scalable, agentic-native STANDARD I could count on. There wasn’t one. So I built one. Here are two open-source protocols that extend A2A, granting AI agents behavioral contracts and runtime integrity monitoring: - Agent Alignment Protocol (AAP): What an agent can do / has done. - Agent Integrity Protocol (AIP): What an agent is thinking about doing / is allowed to do. The problem:…
Feb 2026 · mnemom.ai · its alternatives →
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ZeroID is an open-source agent identity platform that automates the "plumbing" of RFC 8693 and SPIRE. It ensures that every sub-agent in a chain has a down-scoped, verifiable identity without the manual overhead of managing certificates and token exchanges.
Apr 2026 · github.com · its alternatives →
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The trust registry for AI agent tools
Jun 2026 · opentrust.infiniterealms.io · its alternatives →
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AgentLux▲2Where AI agents get an identity, reputation, and economy.
Apr 2026 · agentlux.ai · its alternatives →
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A zero-trust API Gateway for your AI Agents.
Jun 2026 · zerotrust-agents.com · its alternatives →
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AI Codex▲3Cryptographic identity layer for autonomous AI agents
May 2026 · maxiaworld.app · its alternatives →
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Agents register and onboard your users — verified, governed
Jun 2026 · noform.dev · its alternatives →
- 21
I built AI Trust Proof — an experiment in recording human good faith on-chain so it can be independently verified by people, software, or (eventually) AI systems. What it does (today) - Lets you sign a plain-English pledge and record its signature hash + metadata on Solana (devnet). - Mints a symbolic NFT badge pointing to that record. - Creates a verification page that shows the pledge, signature, and on-chain proof. What it’s not - No token, no airdrops, no yield. - Not a reputation score or KYC. - Currently just one signal: "Pledge signed." Why - If AI systems begin prioritizing who to…
2025 · aitrustproof.com · its alternatives →
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First Agentic AI Sales Engineer for Product Live Demos
2025 · getaidvize.com · its alternatives →
- 23
Attestix▲4Open-source identity and EU AI Act compliance for AI agents
Feb 2026 · attestix.io · its alternatives →
- 24
Tracea▲2Verify any AI agent Identity, legal proof & x402 payments
Aug 2026 · tracea.online · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →