Pricing
Open source is free forever.
Paid tiers buy room for private projects, and nothing else. A card looks the same on every tier.
Everything is free during the preview. Billing starts with 60 days' notice here. Preview workspaces keep Team free for 6 months after that.
Free
Free, forever
- Unlimited public projects
- 3 private projects in the workspace
- Cards, IZ4 badges, reports and history
- Dependency coverage
most teams
Team
£29 / workspace / month
or £290 a year
- 25 private projects in the workspace
- Publish chosen invariants on a private card
- IZ4 badges for private projects
- Unlimited members
- Private history and change indicators
Estate
£249 / workspace / month
or £2,490 a year
- Unlimited private projects in the workspace
- Publish chosen invariants on a private card
- Priority support
How it works
- You pay per workspace. One price covers everyone in it and every public project it holds.
- The tiers differ in two things: how many private projects in the workspace, and whether a private card can show invariants you choose to publish. Nothing else changes between tiers.
- Anyone may read a card, on any tier, without paying.
- Prices are in GBP plus VAT and are billed monthly. You can cancel at any time.
- Future: estate-level reporting. It is not part of any tier yet and carries no price.
Our promises
- Money never buys a better card. A failed check looks the same on every tier.
- Miss a payment and nothing disappears. The workspace becomes read-only above the free allowance, and every card stays up.
- The IZ4 badge says one thing: the current revision has a valid IZ4. It does not say the software is good.
- Your private IZ4 is yours. We never open a private repository. A card carries counts and digests, and only the invariants you choose to publish, in your own words. Nothing you send us goes to an AI model.