Start Free
Scale When Ready
Full platform access on every tier. No credit card required.
- Lifetime Pro access
- Unlimited memories forever
- Unlimited namespaces
- 25 team members (+£3/extra)
- All future updates included
- Priority support forever
- Founding Member badge
- Early access to new features
Only available to the first 100 customers. Never offered again.
Or choose a subscription plan:
- All 9 entity types
- Knowledge graph
- MCP Server
- REST API
- Semantic search
- 1 namespace
- 1 user
- 100 memories
- 50 API calls/day
- Team collaboration
- Priority support
- All 9 entity types
- Knowledge graph
- MCP Server
- REST API
- Semantic search
- 3 namespaces
- 1 user
- 2,500 memories
- 500 API calls/day
- Team collaboration
- Email support
- All 9 entity types
- Knowledge graph
- MCP Server
- REST API
- Semantic search
- Unlimited namespaces
- 10 users (+£3/extra)
- Unlimited memories
- Unlimited API calls
- Team collaboration
- Priority support
All plans use your own PostgreSQL database (Neon free tier, AWS RDS, or local).
Compare Plans
| Feature | Starter | Developer | Pro | Enterprise |
|---|---|---|---|---|
| Price | Free | £9.99/mo | £24.99/mo | Custom |
| Users | 1 | 1 | 10 (+£3/extra) | Unlimited |
| Namespaces | 1 | 3 | Unlimited | Unlimited |
| Memories | 100 | 2,500 | Unlimited | Unlimited |
| API calls/day | 50 | 500 | Unlimited | Unlimited |
| Entity types | 9 | 9 | 9 | 9 |
| Relationship types | 12 | 12 | 12 | 12 |
| MCP tools | 20 | 20 | 20 | 20 |
| REST endpoints | 60+ | 60+ | 60+ | 60+ |
| AI Builder | ||||
| Semantic search | ||||
| Graph traversal | ||||
| Team collaboration | ||||
| Priority support | ||||
| Dedicated support | ||||
| SLA guarantee |
FAQ
Where is my data stored?
Your data stays on your PostgreSQL database. We recommend Neon (free tier available), but you can use any PostgreSQL: AWS RDS, Google Cloud SQL, Azure, Supabase, or local.
What's the difference between Starter and Developer?
Starter is completely free with 100 memories and 50 API calls/day - perfect for trying ACE. Developer (£9.99/mo) gives you 2,500 memories, 500 API calls/day, and 3 namespaces for more serious projects.
When should I upgrade to Pro?
Upgrade to Pro when you need team collaboration (multiple users), unlimited memories, or unlimited API access. Pro is designed for teams with 10 users included.
What is the MCP Server?
MCP (Model Context Protocol) lets AI CLI tools call ACE functions natively. Claude Code, Codex CLI, Gemini CLI, Cursor, Windsurf, and ChatGPT all support MCP. ACE provides 20 specialized tools, 9 resources, and 6 workflow prompts.
What entity types does ACE support?
ACE supports 9 entity types: Issues, Decisions, Work Logs, Architecture, Best Practices, Patterns, Tags, Relationships, and Generic Memories. Each has specialized fields designed for developer workflows.
How does the knowledge graph work?
The knowledge graph connects any entity to any other using 12 relationship types (implements, references, blocks, etc.). Your AI can traverse the graph to discover related context automatically.
What is AI Builder?
AI Builder generates complete project plans from natural language requirements. Describe what you want to build, and ACE creates structured decisions, architecture components, patterns, and issues - all linked with relationships.
Can I upgrade or downgrade?
Yes. Upgrade anytime and changes take effect immediately. Downgrade at the end of your billing period. Your data is always preserved.
How do extra users work on Pro?
Pro includes 10 users for £24.99/month. Need more? Add extra users at £3/user/month. For example, 15 users = £24.99 + £15 = £39.99/month. For larger teams, consider Enterprise.
What payment methods do you accept?
All major credit cards via Stripe. Enterprise plans can arrange invoicing.
Do I need to set up my database?
No. Just connect an empty PostgreSQL database and ACE creates all the tables automatically. Nothing to configure.