Open source focus
Open Source Alternatives to Testcards
60 open source Developer Tools options similar to Testcards, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Each profile notes license and self-hosting where we have it.
Stripe, Inc.72BillingSouth San Francisco, United States$11.4BOpen source
Paid57Agentic AISan Francisco, United States$21.0MOpen source
RevenueCat57FintechSan Francisco, United States$50.0MOpen source
- SASapiom55Agentic AISan Francisco, United States$15.8M
Open source
BasisTheory55FintechSan Francisco, United States$17.0MOpen source
Tweed54FintechNew York, United States$4.0MOpen source
Nevermined50Agentic AISan Francisco, United StatesOpen source
Horizon Blockchain Games47FintechToronto, Canada$10.0MOpen source
Natural39Agentic PaymentsSan Francisco, United States$12.0MOpen source
xpay28FintechBengaluru, IndiaOpen source
Bluemoney24FintechTel Aviv, IsraelOpen source
Faremeter22FintechOpen source · Self-hostable
Tryledger21FintechOpen source
- AUAutumnAI InfrastructureSan Francisco, United States
Open source · Self-hostable
Forter85FintechNew York, United States$550.0MOpen source
Plaid74FintechSan Francisco, United States$734.3MOpen source
Rapyd73PaymentsLondon, United Kingdom$1.3BOpen source
Razorpay73FintechBengaluru, IndiaOpen source
Temporal71Workflow AutomationSeattle, United States$134.0MOpen source
Chargebee69FintechChennai, India$303.0MOpen source
Stripes AI68FintechSouth San Francisco, United States$25.4MOpen source
Alpaca67FintechNew York, United States$202.0MOpen source
Dust65Agentic AIParis, France$15.0MOpen source
Weights & Biases (W&B)63MLOpsSan Francisco, United States$521.0MOpen source
Trigger Device Inc63AI AgentsLondon, United Kingdom$16.5MOpen source · Self-hostable
Orkes62Artificial IntelligenceSanta Clara, USA$89.3MOpen source
Comet ML62MLOpsNew York, United States$69.8MOpen source
Monad Labs62BlockchainNew York, United States$266.0MOpen source
Komodor61Software DevelopmentTel Aviv, Israel$67.0MOpen source
LangChain61Agentic AISan Francisco, United States$260.0MOpen source
Composio59Agentic AISan Francisco, United States$50.0MOpen source
Fal58Agentic AISan Francisco, United States$182.3MOpen source
Steel.dev58Developer ToolsTel Aviv, Israel$17.0MOpen source · Self-hostable
Comfy Org58AI Image Generation$30.0MOpen source
BotCity57RPASão Paulo, Brazil$16.5MOpen source
Pipedream56Workflow AutomationSan Francisco, United States$55.0MOpen source
Catena Labs56Agentic AISan Francisco, United States$36.0MOpen source
Auto-GPT56Agentic AI$12.0MOpen source · Self-hostable
Raycast55ProductivityLondon, United Kingdom$17.7MOpen source
giniX54Generative AITel Aviv, IsraelOpen source
Lean54MLOpsSan Francisco, United StatesOpen source
KiloClaw54Artificial IntelligenceOpen source · Self-hostable
Toolbase54Developer ToolsSan Francisco, United StatesOpen source
DVC54MLOpsSan Francisco, United States$154.0MOpen source · Self-hostable
Connext54Fintech$12.0MOpen source
- AGAgentDesk / BrowserTools54Recruitment Tech$17.0M
Open source
Svix53EnterpriseSan Francisco, United States$2.6MOpen source
Banked53FintechLondon, United Kingdom$2.0MOpen source
Langflow53Agentic AILisbon, PortugalOpen source · Self-hostable
Fhenix53BlockchainNew York, United States$22.0MOpen source
Runhouse52EnterpriseSan Francisco, United States$4.9MOpen source
Baz52Developer ToolsTel Aviv, Israel$8.0MOpen source
PPRO52FintechLondon, United Kingdom$150.0MOpen source
Aviator51MLOpsSan Francisco, United States$2.4MOpen source
Kima50BlockchainTel Aviv, Israel$6.7MOpen source
Bauplanlabs49MLOpsSan Francisco, United StatesOpen source
- SUSuperfluid Foundation49FintechZug, Switzerland$28.2M
Open source · Self-hostable
Tapaya48FintechPrague, Czech Republic$1.1MOpen source
Inngest Inc.48Developer ToolsSan Francisco, United States$5.0MOpen source
cal.com47Scheduling SoftwareBerlin, GermanyOpen source · Self-hostable
| Company | Sector | License | HQ | Funding | Score |
|---|---|---|---|---|---|
| Stripe, Inc. | Billing | Open source | South San Francisco, United States | $11.4B | 72 |
| Paid | Agentic AI | Open source | San Francisco, United States | $21.0M | 57 |
| RevenueCat | Fintech | Open source | San Francisco, United States | $50.0M | 57 |
| SASapiom | Agentic AI | Open source | San Francisco, United States | $15.8M | 55 |
| BasisTheory | Fintech | Open source | San Francisco, United States | $17.0M | 55 |
| Tweed | Fintech | Open source | New York, United States | $4.0M | 54 |
| Nevermined | Agentic AI | Open source | San Francisco, United States | — | 50 |
| Horizon Blockchain Games | Fintech | Open source | Toronto, Canada | $10.0M | 47 |
| Natural | Agentic Payments | Open source | San Francisco, United States | $12.0M | 39 |
| xpay | Fintech | Open source | Bengaluru, India | — | 28 |
| Bluemoney | Fintech | Open source | Tel Aviv, Israel | — | 24 |
| Faremeter | Fintech | Open source · Self-hostable | — | — | 22 |
| Tryledger | Fintech | Open source | — | — | 21 |
| AUAutumn | AI Infrastructure | Open source · Self-hostable | San Francisco, United States | — | — |
| Forter | Fintech | Open source | New York, United States | $550.0M | 85 |
| Plaid | Fintech | Open source | San Francisco, United States | $734.3M | 74 |
| Rapyd | Payments | Open source | London, United Kingdom | $1.3B | 73 |
| Razorpay | Fintech | Open source | Bengaluru, India | — | 73 |
| Temporal | Workflow Automation | Open source | Seattle, United States | $134.0M | 71 |
| Chargebee | Fintech | Open source | Chennai, India | $303.0M | 69 |
| Stripes AI | Fintech | Open source | South San Francisco, United States | $25.4M | 68 |
| Alpaca | Fintech | Open source | New York, United States | $202.0M | 67 |
| Dust | Agentic AI | Open source | Paris, France | $15.0M | 65 |
| Weights & Biases (W&B) | MLOps | Open source | San Francisco, United States | $521.0M | 63 |
| Trigger Device Inc | AI Agents | Open source · Self-hostable | London, United Kingdom | $16.5M | 63 |
| Orkes | Artificial Intelligence | Open source | Santa Clara, USA | $89.3M | 62 |
| Comet ML | MLOps | Open source | New York, United States | $69.8M | 62 |
| Monad Labs | Blockchain | Open source | New York, United States | $266.0M | 62 |
| Komodor | Software Development | Open source | Tel Aviv, Israel | $67.0M | 61 |
| LangChain | Agentic AI | Open source | San Francisco, United States | $260.0M | 61 |
| Composio | Agentic AI | Open source | San Francisco, United States | $50.0M | 59 |
| Fal | Agentic AI | Open source | San Francisco, United States | $182.3M | 58 |
| Steel.dev | Developer Tools | Open source · Self-hostable | Tel Aviv, Israel | $17.0M | 58 |
| Comfy Org | AI Image Generation | Open source | — | $30.0M | 58 |
| BotCity | RPA | Open source | São Paulo, Brazil | $16.5M | 57 |
| Pipedream | Workflow Automation | Open source | San Francisco, United States | $55.0M | 56 |
| Catena Labs | Agentic AI | Open source | San Francisco, United States | $36.0M | 56 |
| Auto-GPT | Agentic AI | Open source · Self-hostable | — | $12.0M | 56 |
| Raycast | Productivity | Open source | London, United Kingdom | $17.7M | 55 |
| giniX | Generative AI | Open source | Tel Aviv, Israel | — | 54 |
| Lean | MLOps | Open source | San Francisco, United States | — | 54 |
| KiloClaw | Artificial Intelligence | Open source · Self-hostable | — | — | 54 |
| Toolbase | Developer Tools | Open source | San Francisco, United States | — | 54 |
| DVC | MLOps | Open source · Self-hostable | San Francisco, United States | $154.0M | 54 |
| Connext | Fintech | Open source | — | $12.0M | 54 |
| AGAgentDesk / BrowserTools | Recruitment Tech | Open source | — | $17.0M | 54 |
| Svix | Enterprise | Open source | San Francisco, United States | $2.6M | 53 |
| Banked | Fintech | Open source | London, United Kingdom | $2.0M | 53 |
| Langflow | Agentic AI | Open source · Self-hostable | Lisbon, Portugal | — | 53 |
| Fhenix | Blockchain | Open source | New York, United States | $22.0M | 53 |
| Runhouse | Enterprise | Open source | San Francisco, United States | $4.9M | 52 |
| Baz | Developer Tools | Open source | Tel Aviv, Israel | $8.0M | 52 |
| PPRO | Fintech | Open source | London, United Kingdom | $150.0M | 52 |
| Aviator | MLOps | Open source | San Francisco, United States | $2.4M | 51 |
| Kima | Blockchain | Open source | Tel Aviv, Israel | $6.7M | 50 |
| Bauplanlabs | MLOps | Open source | San Francisco, United States | — | 49 |
| SUSuperfluid Foundation | Fintech | Open source · Self-hostable | Zug, Switzerland | $28.2M | 49 |
| Tapaya | Fintech | Open source | Prague, Czech Republic | $1.1M | 48 |
| Inngest Inc. | Developer Tools | Open source | San Francisco, United States | $5.0M | 48 |
| cal.com | Scheduling Software | Open source · Self-hostable | Berlin, Germany | — | 47 |