Proof Holdings vs Inngest
Inngest is a superb durable-execution platform — its waitForEvent primitive can pause an AI agent for a human, but you build the notification, the UI, and the record yourself. Proof Holdings is the packaged approval: request, human decision over Telegram/WhatsApp, portable proof token back.
Inngest gives you the wait; Proof gives you the approval. Pair them if you like — but when the decision itself must be evidence, Proof returns it as a signed ES256 token with the human's response inside.
One API · One key
One key does what a stack of vendors does
Every platform on this page treats human approval as one feature among many. Proof is a single API where the approval is the product — the same flow returns a signed, offline-verifiable ES256 token for each of these:
Flat price · Any asset
One flat price for every asset — phone, email, and domain today, with wallet and social coming soon. No per-seat, no per-MAU, no per-verification tiers — the meter that makes every rival's bill jump.
- Free every month
- 300 proofs
- Pay as you go
- €0.03 / proof
- At volume
- €0.0079 / proof
Feature Comparison
Swipe to compare →
| Feature | Proof Holdings | Inngest |
|---|---|---|
| Core job | Packaged approval API → portable proof token | Durable execution (a pause primitive, not an approval product) |
| Approval mechanism | One API call → signed decision | step.waitForEvent / waitForSignal (you build the rest) |
| Built-in approver UI / channel | Telegram, WhatsApp | No |
| Signed, portable proof | ES256 JWT, offline-verifiable | No |
| Record of the decision | Cryptographic token | Event/signal in Inngest run history |
| AI-agent orchestration | HITL for agent tool calls | AgentKit (strong multi-agent framework) |
| Durability (long waits, retries) | Approval TTLs | Best-in-class (hours/days, replay) |
| Pricing model | Per-proof | Per-execution |
| Free tier | 300 proofs/month | 50,000 executions/month |
Pricing
Pricing model
Proof Holdings
Per-proof: €0.0079, 300 free/month
Inngest
Per-execution: Hobby free 50k/mo; Pro from $99/mo (1M, then $50/1M)
What you get out of the box
Proof Holdings
Approver channel, UI, and a signed proof token
Inngest
A durable pause — you build the channel, UI, and record
Proof of the decision
Proof Holdings
Portable ES256 token, verifiable offline
Inngest
An event in Inngest's run history
Durable execution & agent orchestration
Proof Holdings
Approval TTLs only
Inngest
Best-in-class — long waits, retries, AgentKit
A primitive vs a product
Inngest is one of the best durable-execution platforms out there: checkpointed, retriable steps, long pauses measured in hours or days, and AgentKit for orchestrating AI agents. Its `step.waitForEvent()` can pause a run until a matching event arrives — and AgentKit's human-in-the-loop pattern uses exactly that so an agent can wait for a developer's response.
But look closely at Inngest's own human-in-the-loop example and the approval notification is a code comment: "send a Slack message to the developer." Inngest gives you the durable *pause*; you build the notification, the approve/deny UI, the delivery channel, and the record. Proof Holdings is the other half — the packaged approval: it delivers the request to a real person on Telegram or WhatsApp and returns the decision as a signed token.
They compose — durability plus proof
This isn't really a rivalry; it's a layering. Inngest is the right tool when you need durable orchestration — retries, replay, waits that survive restarts. What it deliberately doesn't provide is an approver interface, a delivery channel, an account model, or a cryptographic record; those are yours to assemble.
Proof supplies precisely that missing half: a human reachable with no app install, and an ES256 proof token anyone can verify offline. A natural pattern is to run the durable workflow on Inngest and call Proof for the human approval step, so you get Inngest's durability *and* a portable signed proof — rather than hand-rolling the approval UI and a non-verifiable log yourself.
When to use Inngest
- You need durable execution: retries, replay, and pauses that survive restarts
- You're orchestrating AI agents and want a strong multi-agent framework (AgentKit)
- You want a low-level, flexible primitive and are happy to build the approval UX
- Per-execution billing with a generous free tier fits your workload
- Your human step can live inside tooling you already build
When to use Proof Holdings
- You want the approval packaged — channel, UI, and a signed record included
- You want a portable, offline-verifiable proof of every approval
- You don't want to build a notification channel and approver interface yourself
- You want approvals over Telegram/WhatsApp with no app install
- You need non-repudiation, not an event in a run history
- You'd rather call one endpoint than assemble a HITL flow from primitives
Frequently Asked Questions
Ready to try Proof Holdings?
300 free proofs per month. No credit card required.
Building with an AI agent? The 176-tool MCP server and test mode let an agent run a real verification right now — machine quickstart in llms-full.txt.