Open source focus
Open Source Alternatives to Wallester
60 open source Fintech options similar to Wallester, 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
Chargebee69FintechChennai, India$303.0MOpen source
Stripes AI68FintechSouth San Francisco, United States$25.4MOpen source
Plaid74FintechSan Francisco, United States$734.3MOpen source
Razorpay73FintechBengaluru, IndiaOpen source
Rapyd73PaymentsLondon, United Kingdom$1.3BOpen source
Paddle67FintechLondon, United Kingdom$318.0MOpen source
Mercury64FintechSan Francisco, United States$500.0MOpen source
Afterpay61FintechMelbourne, Australia$1.0BOpen source
Shift4 Europe61FintechAllentown, United States$160.0MOpen source
Iyzico58FintechIstanbul, Turkey$30.6MOpen source
RevenueCat57FintechSan Francisco, United States$50.0MOpen source
Paid57Agentic AISan Francisco, United States$21.0MOpen source
Shopify55E-commerce PlatformOttawa, Canada$122.3MOpen source
Volt55FintechLondon, United Kingdom$140.0MOpen source
Tweed54FintechNew York, United States$4.0MOpen source
Banked53FintechLondon, United Kingdom$2.0MOpen source
PPRO52FintechLondon, United Kingdom$150.0MOpen source
- SUSuperfluid Foundation49FintechZug, Switzerland$28.2M
Open source · Self-hostable
Horizon Blockchain Games47FintechToronto, Canada$10.0MOpen source
Tapaya46FintechPrague, Czech Republic$1.1MOpen source
Prava46FintechSan Francisco, United States$1.5MOpen source
Ecton Labs40FintechNew York, United StatesOpen source
Credbull40FintechTel Aviv, Israel$1.5MOpen source
Natural39Agentic PaymentsSan Francisco, United States$12.0MOpen source
KNAV34Financial ServicesAtlanta, USA$1.0MOpen source
Lava Payments29FintechLondon, United Kingdom$7.8MOpen source
xpay28FintechBengaluru, IndiaOpen source
Traditional Payment Gateways (Stripe, PayPal)23FintechSan Francisco, United StatesOpen source
Tryledger21FintechOpen source
Mercury Technologies, .19FintechSan Francisco, United StatesOpen source
Hycos AI15EnterpriseOpen source
Aemetis15Climate TechCupertino, United StatesOpen source · Self-hostable
- LOLobster.cash9Fintech
Open source
FincharterFintechOpen source
arnipayFintechAsunción, ParaguayOpen source
- FlasFintechSan Francisco, United States
Open source
VelocitypayFintechOpen source
Forter85FintechNew York, United States$550.0MOpen source
Alchemy76BlockchainSan Francisco, United States$450.0MOpen source
- UPUpvest69FintechBerlin, Germany$392.0M
Open source
Alpaca67FintechNew York, United States$202.0MOpen source
Chainalysis67FintechNew York, United States$170.0MOpen source
Phantom66FintechSan Francisco, United States$268.0MOpen source
Rewire63FintechTel Aviv, Israel$57.0MOpen source
Clair63FintechNew York, United States$67.7MOpen source
XMTP63AISan Francisco, United States$49.9MOpen source
Basis Theory62FintechMill Valley, United States$50.0MOpen source
Wirex62FintechLondon, United Kingdom$15.0MOpen source
Dune Analytics62FintechOslo, Norway$79.4MOpen source
Alloy62FintechSan Francisco, United States$207.0MOpen source
Addepar61FintechNew York City, United States$412.1MOpen source
Solana61BlockchainSan Francisco, United States$195.5MOpen source
Fair Isaac Corporation (FICO)60Financial ServicesBozeman, United StatesOpen source
Mollie60FintechAmsterdam, Netherlands$870.0MOpen source
Finch59FintechSan Francisco, United StatesOpen source
April57FintechNew York, United States$78.0MOpen source
BitPay56FintechAtlanta, United StatesOpen source
Catena Labs56Agentic AISan Francisco, United States$36.0MOpen source
- SASapiom55Agentic AISan Francisco, United States$15.8M
Open source
| Company | Sector | License | HQ | Funding | Score | Website |
|---|---|---|---|---|---|---|
| Stripe, Inc. | Billing | Open source | South San Francisco, United States | $11.4B | 72 | |
| Chargebee | Fintech | Open source | Chennai, India | $303.0M | 69 | |
| Stripes AI | Fintech | Open source | South San Francisco, United States | $25.4M | 68 | |
| Plaid | Fintech | Open source | San Francisco, United States | $734.3M | 74 | |
| Razorpay | Fintech | Open source | Bengaluru, India | — | 73 | |
| Rapyd | Payments | Open source | London, United Kingdom | $1.3B | 73 | |
| Paddle | Fintech | Open source | London, United Kingdom | $318.0M | 67 | |
| Mercury | Fintech | Open source | San Francisco, United States | $500.0M | 64 | |
| Afterpay | Fintech | Open source | Melbourne, Australia | $1.0B | 61 | |
| Shift4 Europe | Fintech | Open source | Allentown, United States | $160.0M | 61 | |
| Iyzico | Fintech | Open source | Istanbul, Turkey | $30.6M | 58 | |
| RevenueCat | Fintech | Open source | San Francisco, United States | $50.0M | 57 | |
| Paid | Agentic AI | Open source | San Francisco, United States | $21.0M | 57 | |
| Shopify | E-commerce Platform | Open source | Ottawa, Canada | $122.3M | 55 | |
| Volt | Fintech | Open source | London, United Kingdom | $140.0M | 55 | |
| Tweed | Fintech | Open source | New York, United States | $4.0M | 54 | |
| Banked | Fintech | Open source | London, United Kingdom | $2.0M | 53 | |
| PPRO | Fintech | Open source | London, United Kingdom | $150.0M | 52 | |
| SUSuperfluid Foundation | Fintech | Open source · Self-hostable | Zug, Switzerland | $28.2M | 49 | |
| Horizon Blockchain Games | Fintech | Open source | Toronto, Canada | $10.0M | 47 | |
| Tapaya | Fintech | Open source | Prague, Czech Republic | $1.1M | 46 | |
| Prava | Fintech | Open source | San Francisco, United States | $1.5M | 46 | |
| Ecton Labs | Fintech | Open source | New York, United States | — | 40 | |
| Credbull | Fintech | Open source | Tel Aviv, Israel | $1.5M | 40 | |
| Natural | Agentic Payments | Open source | San Francisco, United States | $12.0M | 39 | |
| KNAV | Financial Services | Open source | Atlanta, USA | $1.0M | 34 | |
| Lava Payments | Fintech | Open source | London, United Kingdom | $7.8M | 29 | |
| xpay | Fintech | Open source | Bengaluru, India | — | 28 | |
| Traditional Payment Gateways (Stripe, PayPal) | Fintech | Open source | San Francisco, United States | — | 23 | |
| Tryledger | Fintech | Open source | — | — | 21 | |
| Mercury Technologies, . | Fintech | Open source | San Francisco, United States | — | 19 | |
| Hycos AI | Enterprise | Open source | — | — | 15 | |
| Aemetis | Climate Tech | Open source · Self-hostable | Cupertino, United States | — | 15 | |
| LOLobster.cash | Fintech | Open source | — | — | 9 | |
| Fincharter | Fintech | Open source | — | — | — | |
| arnipay | Fintech | Open source | Asunción, Paraguay | — | — | |
| Fintech | Open source | San Francisco, United States | — | — | ||
| Velocitypay | Fintech | Open source | — | — | — | |
| Forter | Fintech | Open source | New York, United States | $550.0M | 85 | |
| Alchemy | Blockchain | Open source | San Francisco, United States | $450.0M | 76 | |
| UPUpvest | Fintech | Open source | Berlin, Germany | $392.0M | 69 | |
| Alpaca | Fintech | Open source | New York, United States | $202.0M | 67 | |
| Chainalysis | Fintech | Open source | New York, United States | $170.0M | 67 | |
| Phantom | Fintech | Open source | San Francisco, United States | $268.0M | 66 | |
| Rewire | Fintech | Open source | Tel Aviv, Israel | $57.0M | 63 | |
| Clair | Fintech | Open source | New York, United States | $67.7M | 63 | |
| XMTP | AI | Open source | San Francisco, United States | $49.9M | 63 | |
| Basis Theory | Fintech | Open source | Mill Valley, United States | $50.0M | 62 | |
| Wirex | Fintech | Open source | London, United Kingdom | $15.0M | 62 | |
| Dune Analytics | Fintech | Open source | Oslo, Norway | $79.4M | 62 | |
| Alloy | Fintech | Open source | San Francisco, United States | $207.0M | 62 | |
| Addepar | Fintech | Open source | New York City, United States | $412.1M | 61 | |
| Solana | Blockchain | Open source | San Francisco, United States | $195.5M | 61 | |
| Fair Isaac Corporation (FICO) | Financial Services | Open source | Bozeman, United States | — | 60 | |
| Mollie | Fintech | Open source | Amsterdam, Netherlands | $870.0M | 60 | |
| Finch | Fintech | Open source | San Francisco, United States | — | 59 | |
| April | Fintech | Open source | New York, United States | $78.0M | 57 | |
| BitPay | Fintech | Open source | Atlanta, United States | — | 56 | |
| Catena Labs | Agentic AI | Open source | San Francisco, United States | $36.0M | 56 | |
| SASapiom | Agentic AI | Open source | San Francisco, United States | $15.8M | 55 |