Alter Vault
A middleman service that lets an AI agent safely log into your other tools (Gmail, Slack, your CRM...) without ever handing it your actual passwords or API keys — the agent gets a narrow, temporary, revocable key just for the one task it needs to do, and
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Description
If you want an AI agent to actually do something useful — send an email, update a CRM record, check a calendar — it needs credentials to those services. Handing an autonomous agent your real API keys is risky: if it's manipulated or buggy, it now has broad, standing access to everything those keys unlock. Alter Vault exists to remove that risk by sitting between agents and the 100+ SaaS tools they need to reach, issuing narrow, short-lived, revocable credentials instead of raw keys.
Alter Vault (a Y Combinator S25 company, originally launched as alterai.dev) manages OAuth tokens and API keys centrally, verifies agent identity, enforces fine-grained policies on what each agent can do, applies rate limits, and keeps a full audit log of every call made through it. It ships Python and TypeScript SDKs, a developer dashboard, and an end-user portal, and is aimed at teams building agent frameworks or chatbots that need real third-party access without the security exposure of static, long-lived credentials scattered across code.
💬 Our review
The short version: this is the credential-management piece of the fast-growing "secure my AI agents" stack — instead of an agent holding a real API key in its config, Alter Vault hands it a scoped, expiring one and logs what it did with it.
The free tier (10K calls/month) is generous enough to build and test a real integration before paying, and $50/month for 100K calls at Starter is accessible for a small team's first production agent. The jump to $250/month at Growth (1M calls) plus $0.50 per extra 1K calls means costs scale roughly linearly with agent usage, which is predictable but can add up fast for a high-traffic consumer-facing agent. As a fresh YC S25 company, it's unproven at large scale compared to established secrets managers (HashiCorp Vault, AWS Secrets Manager) — but those weren't built with AI agents specifically in mind, which is Alter Vault's actual pitch.
💰 Pricing
📊 Global score
🤖 AI-enriched data
Gratuit : 10 000 appels/mois. Starter : 50 $/mois (100 000 appels). Growth : 250 $/mois (1M appels). Enterprise : sur devis. Appels supplémentaires : 0,50 $/1000.
Pros
Identifiants à portée réduite et temporaires plutôt que des clés API brutes et permanentes
100+ intégrations SaaS prêtes à l'emploi
Journal d'audit complet de chaque appel effectué par un agent
Plan gratuit généreux (10 000 appels/mois) pour tester avant de payer
Cons
Startup très récente (YC S25) — peu de recul en production à grande échelle
Coût qui grimpe assez vite au-delà du plan gratuit pour un agent à fort trafic
Face à des gestionnaires de secrets généralistes établis (HashiCorp Vault), la différenciation repose surtout sur le focus "agents IA" spécifiquement