Best Finance & Accounting Tools in 2026

OpenBB

AI-powered research and analytics workspace

Stars
66,657
Forks
6,658
Last commit
18 hours ago

Integrate, visualize, and analyze data in one place with OpenBB's AI-driven platform for financial research and analytics.

Open Source Alternative to:

Power BI

Hyperswitch

Open source payment orchestrator for global transactions

Stars
42,558
Forks
4,607
Last commit
8 hours ago

A unified payment infrastructure that connects multiple payment processors through a single API integration, enabling global payment processing

Open Source Alternative to:

Stripe Billing

ERPNext

Comprehensive business management, tailored for you

Stars
33,257
Forks
11,058
Last commit
9 hours ago

Open-source ERP solution offering modules for accounting, inventory, HR, CRM, and more. Customizable and scalable for businesses of all sizes.

Open Source Alternative to:

SAP

Midday

Streamline your business finances and operations

Stars
14,205
Forks
1,388
Last commit
8 days ago

All-in-one tool for freelancers and small businesses to manage finances, track time, store files, and send invoices efficiently.

Open Source Alternative to:

YNAB

Gumroad

Your all-in-one marketplace for digital creators and products

Stars
8,967
Forks
1,879
Last commit
8 hours ago

A digital marketplace platform where creators can sell digital products, from courses to software, with built-in payment processing and content delivery.

Open Source Alternative to:

Stripe

Akaunting

Free, open-source accounting for small businesses

Stars
9,768
Forks
2,893
Last commit
5 days ago

Cloud-based accounting software offering invoicing, expense tracking, and financial reporting for entrepreneurs and small businesses.

Open Source Alternative to:

Quickbooks

Polar

Modern payment infrastructure for digital products and SaaS

Stars
9,767
Forks
706
Last commit
9 hours ago

Comprehensive payment solution with built-in tax handling, automated benefits, and seamless integrations for digital product and SaaS businesses.

Open Source Alternative to:

Stripe

Invoice Ninja

Send invoices, accept payments, manage your business—all free

Stars
9,701
Forks
2,623
Last commit
5 days ago

Free invoicing software for freelancers and small businesses. Create professional invoices, track expenses, accept online payments, and manage projects without hidden fees.

Open Source Alternative to:

Quickbooks

Lago

Transform complex usage data into accurate, real-time billing

Stars
9,595
Forks
592
Last commit
2 days ago

Open-source billing system that handles metering, usage-based pricing, and invoicing at scale. Perfect for AI, cloud, and API companies needing flexible monetization.

Open Source Alternative to:

Stripe Billing

Expensify

Simplify expense management for businesses of all sizes

Stars
4,842
Forks
3,737
Last commit
8 hours ago

Automate expense reporting, reimbursements, and corporate card management with real-time data sync and powerful integrations.

Crater

AI-powered embedded AR/AP automation for platforms

Stars
8,281
Forks
1,684
Last commit
2 years ago

Crater offers AI-driven invoicing workflows, payments, and working capital tools to enhance your platform with minimal technical effort.

Open Source Alternative to:

Quickbooks

Frappe Books

Modern desktop accounting made simple and free

Stars
4,603
Forks
1,066
Last commit
19 days ago

A user-friendly desktop accounting software that helps businesses manage invoices, track expenses, and handle bookkeeping with a modern interface.

Open Source Alternative to:

Quickbooks

Kimai

Effortless time tracking for teams and projects

Stars
4,617
Forks
770
Last commit
1 day ago

Open-source time tracking solution for businesses of all sizes. Manage projects, track billable hours, and generate insightful reports.

Open Source Alternative to:

Toggl

Flexprice

Open source metering and billing infrastructure for any pricing model

Stars
3,558
Forks
152
Last commit
8 hours ago

A flexible billing platform that handles usage-based metering, credit management, and subscription billing, giving developers full control over pricing models.

Open Source Alternative to:

Stripe Billing

Bigcapital

Automate financial processes for smarter business decisions

Stars
3,624
Forks
427
Last commit
2 days ago

Cloud-based accounting software that streamlines bookkeeping, generates intelligent reports, and offers multi-currency support for efficient financial management.

Open Source Alternative to:

Quickbooks

Autumn

Stripe payments, usage tracking, and paywalls in 3 functions

Stars
2,509
Forks
213
Last commit
8 hours ago

Simplify Stripe integration for AI startups with 3 functions, 0 webhooks. Build pricing plans in 30 minutes with usage tracking, credits, and feature controls.

Open Source Alternative to:

Stripe Billing

Spliit

Effortlessly split expenses with friends and roommates

Stars
2,649
Forks
422
Last commit
5 months ago

A user-friendly app for tracking shared expenses, settling debts, and managing group finances with ease and transparency.

Open Source Alternative to:

Splitwise

OpenMeter

Real-time usage metering and billing for AI companies

Stars
1,936
Forks
165
Last commit
9 hours ago

Open source billing platform that turns events into revenue with real-time metering, usage limits, and flexible pricing. Integrates with Stripe, CRMs, and payment providers.

Open Source Alternative to:

Stripe Billing

Paymenter

Modern open-source billing platform for hosting businesses

Stars
1,664
Forks
367
Last commit
4 days ago

Automate subscriptions and manage payments with a flexible, open-source billing system designed specifically for hosting providers.

Open Source Alternative to:

Stripe Billing

Flowglad

Open-source payments without webhooks

Stars
1,711
Forks
86
Last commit
1 month ago

Build payment systems with real-time billing state and full-stack SDK. Design pricing in natural language, deploy checkout and metering instantly with zero webhooks.

Open Source Alternative to:

Stripe Billing

Meteroid

Flexible billing infrastructure for modern SaaS

Stars
1,059
Forks
54
Last commit
1 day ago

Open-source pricing and billing platform that helps SaaS companies launch, test, and scale complex billing models with ease. Features metering, invoicing, and real-time data.

Open Source Alternative to:

Stripe Billing

BillaBear

Take control of your billing with deep Stripe integration

Stars
744
Forks
53
Last commit
3 months ago

BillaBear offers powerful tax management, automated workflows, and comprehensive subscription control for businesses using Stripe

Open Source Alternative to:

Stripe Billing

Formance

Open source financial infrastructure for modern businesses

Stars
506
Forks
64
Last commit
29 days ago

Build custom financial flows and integrate with any provider using Formance's agnostic platform

Open Source Alternative to:

Stripe Billing

Captable

Simplify equity management for startups and investors

Stars
805
Forks
171
Last commit
11 months ago

Comprehensive cap table software for startups to manage equity, track ownership, and facilitate fundraising with real-time insights and compliance tools.

Open Source Alternative to:

AngelList

UniBee

Cut billing costs with open-source subscription management

Stars
196
Forks
33
Last commit
2 months ago

Replace expensive billing solutions with open-source software. Automate subscriptions, accept multiple payments including crypto, and gain real-time revenue insights.

Open Source Alternative to:

Stripe Billing

Suprascribe

Automatically discover hidden subscriptions from your inbox

Stars
2
Forks
0
Last commit
2 days ago

Free subscription tracker that automatically scans your email to find recurring charges. Privacy-focused discovery with complete spending overview and management tools.

Open Source Alternative to:

Rocket Money

OpenBB

AI-powered research and analytics workspace

Stars
66,657
Forks
6,658
Last commit
18 hours ago

Integrate, visualize, and analyze data in one place with OpenBB's AI-driven platform for financial research and analytics.

Open Source Alternative to:

Power BI

Hyperswitch

Open source payment orchestrator for global transactions

Stars
42,558
Forks
4,607
Last commit
8 hours ago

A unified payment infrastructure that connects multiple payment processors through a single API integration, enabling global payment processing

Open Source Alternative to:

Stripe Billing

ERPNext

Comprehensive business management, tailored for you

Stars
33,257
Forks
11,058
Last commit
9 hours ago

Open-source ERP solution offering modules for accounting, inventory, HR, CRM, and more. Customizable and scalable for businesses of all sizes.

Open Source Alternative to:

SAP

Midday

Streamline your business finances and operations

Stars
14,205
Forks
1,388
Last commit
8 days ago

All-in-one tool for freelancers and small businesses to manage finances, track time, store files, and send invoices efficiently.

Open Source Alternative to:

YNAB

Gumroad

Your all-in-one marketplace for digital creators and products

Stars
8,967
Forks
1,879
Last commit
8 hours ago

A digital marketplace platform where creators can sell digital products, from courses to software, with built-in payment processing and content delivery.

Open Source Alternative to:

Stripe

Akaunting

Free, open-source accounting for small businesses

Stars
9,768
Forks
2,893
Last commit
5 days ago

Cloud-based accounting software offering invoicing, expense tracking, and financial reporting for entrepreneurs and small businesses.

Open Source Alternative to:

Quickbooks

Polar

Modern payment infrastructure for digital products and SaaS

Stars
9,767
Forks
706
Last commit
9 hours ago

Comprehensive payment solution with built-in tax handling, automated benefits, and seamless integrations for digital product and SaaS businesses.

Open Source Alternative to:

Stripe

Invoice Ninja

Send invoices, accept payments, manage your business—all free

Stars
9,701
Forks
2,623
Last commit
5 days ago

Free invoicing software for freelancers and small businesses. Create professional invoices, track expenses, accept online payments, and manage projects without hidden fees.

Open Source Alternative to:

Quickbooks

Lago

Transform complex usage data into accurate, real-time billing

Stars
9,595
Forks
592
Last commit
2 days ago

Open-source billing system that handles metering, usage-based pricing, and invoicing at scale. Perfect for AI, cloud, and API companies needing flexible monetization.

Open Source Alternative to:

Stripe Billing

Expensify

Simplify expense management for businesses of all sizes

Stars
4,842
Forks
3,737
Last commit
8 hours ago

Automate expense reporting, reimbursements, and corporate card management with real-time data sync and powerful integrations.

Crater

AI-powered embedded AR/AP automation for platforms

Stars
8,281
Forks
1,684
Last commit
2 years ago

Crater offers AI-driven invoicing workflows, payments, and working capital tools to enhance your platform with minimal technical effort.

Open Source Alternative to:

Quickbooks

Frappe Books

Modern desktop accounting made simple and free

Stars
4,603
Forks
1,066
Last commit
19 days ago

A user-friendly desktop accounting software that helps businesses manage invoices, track expenses, and handle bookkeeping with a modern interface.

Open Source Alternative to:

Quickbooks

Kimai

Effortless time tracking for teams and projects

Stars
4,617
Forks
770
Last commit
1 day ago

Open-source time tracking solution for businesses of all sizes. Manage projects, track billable hours, and generate insightful reports.

Open Source Alternative to:

Toggl

Flexprice

Open source metering and billing infrastructure for any pricing model

Stars
3,558
Forks
152
Last commit
8 hours ago

A flexible billing platform that handles usage-based metering, credit management, and subscription billing, giving developers full control over pricing models.

Open Source Alternative to:

Stripe Billing

Bigcapital

Automate financial processes for smarter business decisions

Stars
3,624
Forks
427
Last commit
2 days ago

Cloud-based accounting software that streamlines bookkeeping, generates intelligent reports, and offers multi-currency support for efficient financial management.

Open Source Alternative to:

Quickbooks

Autumn

Stripe payments, usage tracking, and paywalls in 3 functions

Stars
2,509
Forks
213
Last commit
8 hours ago

Simplify Stripe integration for AI startups with 3 functions, 0 webhooks. Build pricing plans in 30 minutes with usage tracking, credits, and feature controls.

Open Source Alternative to:

Stripe Billing

Spliit

Effortlessly split expenses with friends and roommates

Stars
2,649
Forks
422
Last commit
5 months ago

A user-friendly app for tracking shared expenses, settling debts, and managing group finances with ease and transparency.

Open Source Alternative to:

Splitwise

OpenMeter

Real-time usage metering and billing for AI companies

Stars
1,936
Forks
165
Last commit
9 hours ago

Open source billing platform that turns events into revenue with real-time metering, usage limits, and flexible pricing. Integrates with Stripe, CRMs, and payment providers.

Open Source Alternative to:

Stripe Billing

Paymenter

Modern open-source billing platform for hosting businesses

Stars
1,664
Forks
367
Last commit
4 days ago

Automate subscriptions and manage payments with a flexible, open-source billing system designed specifically for hosting providers.

Open Source Alternative to:

Stripe Billing

Flowglad

Open-source payments without webhooks

Stars
1,711
Forks
86
Last commit
1 month ago

Build payment systems with real-time billing state and full-stack SDK. Design pricing in natural language, deploy checkout and metering instantly with zero webhooks.

Open Source Alternative to:

Stripe Billing

Meteroid

Flexible billing infrastructure for modern SaaS

Stars
1,059
Forks
54
Last commit
1 day ago

Open-source pricing and billing platform that helps SaaS companies launch, test, and scale complex billing models with ease. Features metering, invoicing, and real-time data.

Open Source Alternative to:

Stripe Billing

BillaBear

Take control of your billing with deep Stripe integration

Stars
744
Forks
53
Last commit
3 months ago

BillaBear offers powerful tax management, automated workflows, and comprehensive subscription control for businesses using Stripe

Open Source Alternative to:

Stripe Billing

Formance

Open source financial infrastructure for modern businesses

Stars
506
Forks
64
Last commit
29 days ago

Build custom financial flows and integrate with any provider using Formance's agnostic platform

Open Source Alternative to:

Stripe Billing

Captable

Simplify equity management for startups and investors

Stars
805
Forks
171
Last commit
11 months ago

Comprehensive cap table software for startups to manage equity, track ownership, and facilitate fundraising with real-time insights and compliance tools.

Open Source Alternative to:

AngelList

UniBee

Cut billing costs with open-source subscription management

Stars
196
Forks
33
Last commit
2 months ago

Replace expensive billing solutions with open-source software. Automate subscriptions, accept multiple payments including crypto, and gain real-time revenue insights.

Open Source Alternative to:

Stripe Billing

Suprascribe

Automatically discover hidden subscriptions from your inbox

Stars
2
Forks
0
Last commit
2 days ago

Free subscription tracker that automatically scans your email to find recurring charges. Privacy-focused discovery with complete spending overview and management tools.

Open Source Alternative to:

Rocket Money

Open Source Finance & Accounting Tools

A curated collection of the best open source tools for managing financial transactions, accounting, and billing.