What is Invoance?
Invoance is an API that signs, stores and verifies events, documents, AI outputs and audit logs, so anyone can check a record without trusting the company that kept it.
- event_id
- 7c1e4b52-9a0f-4d2e-b6f3-2f8a61c0d9e4
- event_type
- policy.approval
- ingested_at
- 2026-09-22T08:14:07.412Z
- payload_hash
- a3f2b1c9d4e8f70b6c5a1e92d8f4037bc61a9e5d2f7c8b04e3a6d19f5c2b7e80
- signature
- ed25519 · 9f1c…e27a (64 bytes)
- issuer
- acme.com · domain verified
Is Invoance invoicing software?
No. The name is close to invoice and the two are easy to mix up. Invoance does not create, send or collect invoices. It can prove that one has not been changed: anchor the file when it is approved, and any later copy either matches or it does not.
9b74c98e…5d21af069b74c98e…5d21af06Hashes match41e07fa2…c8836b1d| Question | Invoicing software | Invoance |
|---|---|---|
| What it does | Creates, sends and collects invoices | Signs and stores records so they can be checked later |
| What it produces | An invoice and a request for payment | A signed record with a verification link |
| Who uses it | Billing and accounts receivable teams | Engineering, security, compliance and finance teams |
| What it answers | Has this customer paid? | Is this the record as it was signed, and who signed it? |
What does Invoance do?
Your system sends a record to the Invoance API. Invoance hashes it, signs it with your organization's Ed25519 key and writes it to a ledger where the database refuses deletes. Anyone you share it with can check that it still matches what was signed.
- POST /v1/eventsFrom your app, an SDK or the dashboard
- SHA-256 + Ed25519Your organization's key, append-only ledger
- A link or any Ed25519 libraryNo account and no access to your systems
Audit Logs
Signed activity logs for each of your customers, with a viewer they can open themselves.
POST /v1/audit/eventsEvent Ledger
An append-only, signed record of the business events you may need to prove later.
POST /v1/eventsAI Attestation
A signed record of what a model was asked, what it answered, and which model it was.
POST /v1/ai/attestationsDocument Anchoring
Proof that an exact file existed at a given time, without handing the file over.
POST /v1/document/anchorTraces
Group events, documents and AI attestations into one sealed record of a whole process.
POST /v1/tracesB2B SaaS teams
Give enterprise customers signed audit logs they can open, export and check.
Audit LogsFinance teams
Anchor invoices, vendor changes and approvals so an edited copy is caught.
For finance teamsCompliance teams
Hand auditors and examiners evidence they can verify without access to your systems.
For compliance teamsAI product teams
Keep a signed record of what a model was asked, what it answered and which model it was.
AI Attestation| Name | Invoance |
|---|---|
| Company | Invoance, Inc., a Delaware corporation |
| Category | Proof infrastructure, delivered as an API |
| Records | Events, documents, AI outputs, audit logs and traces |
| Hashing | SHA-256 |
| Signing | Ed25519, one key per organization |
| SDKs | Node.js, Python, Go, Java, Ruby, Rust, .NET, PHP, plus REST |
| Pricing | Free Developer plan, paid from $149 a month |
- A specific record existed in a specific form.
- It was signed by a specific organization at a specific time.
- What you are looking at still matches what was signed.
- A sealed trace has had nothing added, removed or reordered.
- That the underlying statement is true.
- That a decision was fair, legal or correct.
- That a document's contents are authentic.
- That you meet a legal or regulatory obligation.
Is Invoance an invoicing app?
Is Invoance a blockchain?
Do I need an account to verify an Invoance record?
Does Invoance see the documents I anchor?
How much does Invoance cost?
Which languages have an Invoance SDK?
Who makes Invoance?
Create your first signed record.
The Developer plan is free and covers all five products.