Pricing
Start free with no card. Verification is never metered, records over a paid plan's allowance are never dropped, and hash-only records are kept with no time limit on every plan.
Free
Available nowNo card needed.
Start free- Users: 1
- Live records a month: 25,000
- Sandbox, local SDK, full verification, exports
- Auditor links: 1 active, expires within 7 days
Solo
Available nowOr £190 a year.
Upgrade to Solo- Users: 1
- Live records a month: 100,000, then £5 per 100,000
- Sandbox, local SDK, full verification, exports
- Auditor links: Unlimited, expiry up to 90 days
- Verification report for a period (HTML or PDF)
- Usage and chain alerts: Email
Team
Available nowOr £490 a year.
Upgrade to Team- Users: Unlimited, with roles
- Live records a month: 250,000, then £5 per 100,000 (£3 above 10 million)
- Sandbox, local SDK, full verification, exports
- Auditor links: Unlimited, any expiry
- Verification report for a period (HTML or PDF)
- Usage and chain alerts: Email and webhook
- Replay, A/B on past decisions
- Encrypted stored content (1 year)
- 7-year retention add-on (£10 a month): Optional
Enterprise
By contract, with the features below.
Email [email protected]- Users: Unlimited, with SSO
- Live records a month: Custom
- Sandbox, local SDK, full verification, exports
- Auditor links: Unlimited, any expiry
- Verification report for a period (HTML or PDF)
- Usage and chain alerts: Email and webhook
- Replay, A/B on past decisions
- Encrypted stored content (1 year): custom retention
- 7-year retention add-on (£10 a month): By contract
- Mapped audit packs (EU AI Act, ISO/IEC 42001, SOC 2)
- SSO, customer keys, self-hosted witness, UK region SLA
Compare plans
| Feature | Free | Solo | Team | Enterprise |
|---|---|---|---|---|
| Price | £0 | £19 a month or £190 a year | £49 a month or £490 a year | Quote |
| Users | 1 | 1 | Unlimited, with roles | Unlimited, with SSO |
| Live records a month | 25,000 | 100,000, then £5 per 100,000 | 250,000, then £5 per 100,000 (£3 above 10 million) | Custom |
| Sandbox, local SDK, full verification, exports | Included | Included | Included | Included |
| Auditor links | 1 active, expires within 7 days | Unlimited, expiry up to 90 days | Unlimited, any expiry | Unlimited, any expiry |
| Verification report for a period (HTML or PDF) | Not included | Included | Included | Included |
| Usage and chain alerts | Not included | Email and webhook | Email and webhook | |
| Replay, A/B on past decisions | Not included | Not included | Included | Included |
| Encrypted stored content (1 year) | Not included | Not included | Included | Yes, custom retention |
| 7-year retention add-on (£10 a month) | Not included | Not included | Optional | By contract |
| Mapped audit packs (EU AI Act, ISO/IEC 42001, SOC 2) | Not included | Not included | Not included | Included |
| SSO, customer keys, self-hosted witness, UK region SLA | Not included | Not included | Not included | Included |
Hash-only records are kept with no time limit on every plan. Free stops taking live records at 25,000 in a month until the next month; they wait on your machine and none are dropped. Solo and Team keep recording past their allowance, billed as usage.
Usage above the included records
| Solo: first 100,000 a monthincluded | £0 |
|---|---|
| Team: first 250,000 a monthincluded | £0 |
| Extra records, the first 9,750,000 in a monthper 100,000 records | £5 |
| Extra records beyond 9,750,000 in a monthper 100,000 records | £3 |
Questions
What counts as a record?
One decision or one outcome. A wrapped tool call is two records. A note you write yourself is one.
What does hash only mean?
The service receives the tool name, the time, the chain links and a salted hash of the content. Inputs and outputs, and the salt, stay on your machine, so the service cannot work out the content from the hash.
Who are Free and Solo for?
One person. Free and Solo hold 1 user each; an organisation made before Free became one user keeps the members it has and cannot add more. Team holds any number of users, with roles.
What is a verification report?
A printable page (HTML, or PDF through the browser's Print command) for one period: what it covers, how many records, the verification result line, chain integrity, the public timestamp status as of the moment it is made, and the exact command to verify independently. It has no control mapping; the audit pack mapped to the EU AI Act, ISO/IEC 42001 and SOC 2 is part of Enterprise.
What is the retention add-on?
Stored content (the inputs and outputs you choose to send) is kept 1 year on Team. The add-on keeps it 7 years instead, for £10 a month per organisation, billed monthly whether Team is paid monthly or annually. Turn it on or off on the console's Billing page. It is for Team only: Solo and Free store no content, and hash-only records are kept with no time limit on every plan. Enterprise sets retention in its contract. If you turn it off, content older than 1 year is deleted at the next daily run; the records stay verifiable.
What if the witness is down?
The hosted witness commits to 99.5% uptime each month. It runs on a single machine on Google Cloud in London, so a failure of that machine counts against the figure. An outage delays co-signing but never loses records already written on your machines: they wait in the local outbox and are sent with their original times when the witness is back. Tools in strict mode do not run until it is. See Security.
What if signafAIde shuts down?
We give at least 12 months' notice before the service stops, and the export tools keep working throughout. If AIMETECH winds the service down, we release the witness server's source under Apache-2.0, so you or anyone else can run it. Packs you have exported keep verifying offline with the open verifier whatever happens to us. This is in the terms, section 16.7.
Can you end my contract?
Without cause, only on at least 90 days' notice, with a pro-rata refund of what you prepaid, and you can export for 90 days after it ends. We can end it sooner only for a material breach that is not put right within 14 days of notice, or insolvency. This is in the terms, sections 16.3 and 16.4.
What is a sandbox project?
A free project that signafaide init creates, with no account, email or card. Until you run it, records stay on your machine; after, only hashes are sent. It takes 5,000 test records a month, gets the same hourly public timestamp as live data, and is deleted after 30 days unless you claim it.
Where is my data held?
On Google Cloud in London (europe-west2), so in the UK by default. Enterprise customers can choose the EU, or run the witness themselves. See Security.
Can I run the witness myself?
Yes, under an Enterprise contract: the witness server is proprietary software, licensed with that contract. What keeps you independent of us is open: the protocol specification, the SDKs and the verifiers are Apache-2.0, and every verification pack you export verifies offline with the open verifier, without our service, for as long as you keep it. See Self-host.