The landscape

Incumbent ledgers

• ERPNext · A free, GPL-3.0 open-source ERP with a full double-entry ledger that you can run on your own server or on Frappe Cloud.
• FreeAgent · A UK cloud ledger for freelancers, sole traders, small limited companies and landlords, free to anyone banking with NatWest, RBS, Ulster Bank or Mettle.
• FreshBooks · Invoicing-first accounting software for freelancers, solopreneurs and small service businesses.
• Microsoft Dynamics 365 Business Central · Microsoft's ERP for small and mid-sized businesses, the cloud successor to Navision and Dynamics NAV, sold through partners.
• MYOB · Australia and New Zealand's long-standing small business accounting and payroll vendor, now running cloud MYOB Business beside AccountRight and Acumatica-based ERP.
• NetSuite acquired · Oracle's cloud ERP for mid-sized companies: general ledger, order-to-cash, procurement, inventory and more in one hosted system.
• Odoo · An open-core suite of business apps, accounting included, that you can run in Odoo's cloud or host yourself.
• QuickBooks Online · Intuit's cloud accounting software, the largest small-business ledger in the US.
• Sage Accounting · Sage's cloud accounting software for UK and European small businesses and sole traders.
• Sage Intacct acquired · A cloud general ledger and financial suite for mid-sized businesses, owned by Sage.
• Wave acquired · Free invoicing and accounting for very small businesses in the US and Canada, owned by H&R Block.
• Xero · Cloud accounting software for small businesses and their accountants, strongest in Australia, New Zealand and the UK.
• Zoho Books · A low-cost cloud ledger for small businesses, part of the Zoho suite, with a self-serve REST API and an official MCP server.

AI-native ledgers

• Campfire · Campfire is a cloud ERP for venture-backed and mid-market finance teams, with its own accounting model and an agent called Ember that works inside the ledger.
• Digits · An AI-native general ledger for startups, small businesses and their accounting firms, with a free API and a read-only MCP server.
• DualEntry · DualEntry is a cloud ERP for mid-market and multi-entity finance teams that promises to move your books in from NetSuite, Sage Intacct, QuickBooks or Xero in a day.
• Kick · Self-driving bookkeeping software for US small business owners and the accounting firms that serve them.
• Layer · An embedded accounting API and white-label bookkeeping service that vertical software platforms ship as their own ledger.
• Light · Light is a Copenhagen-built cloud ledger and financials platform for multi-entity companies, with agents that code bills, clear bank lines and book accruals inside policies you write.
• Pennylane · A French cloud ledger, invoicing and business account that a company and its accountant work in together.
• Puzzle · An AI-native accounting ledger for startups and their bookkeepers that asks you to move your books in, with an MCP server whose writes need your confirmation.
• Rillet · An AI-native ERP for venture-backed and mid-market finance teams, sold as the replacement for NetSuite.

Plain text and local-first

• Actual Budget · A local-first, open-source envelope budgeting app. Every device holds the full budget, and an optional self-hosted server syncs changes between devices.
• Beancount · A double-entry bookkeeping language for text files, with a strict Python core, a SQL-like query language and a separate importer framework.
• Beancount.io · A hosted Beancount service where each ledger is a git repository, with a commercial MCP server that runs BQL queries, previews edits as dry runs and lands every write as a git commit.
• beangulp · The Python framework Beancount uses to turn downloaded statements into ledger entries: identify the file, extract entries, mark likely duplicates and file the original away.
• Fava · An MIT-licensed web interface for Beancount that you run locally over your own ledger files.
• Firefly III · A self-hosted, open-source personal finance manager with double-entry books, a rules engine, a full REST API and a separate data importer.
• Frappe Books pivoted · Free, AGPL-licensed small-business accounting that started as a desktop app keeping one company in one SQLite file, and is now being rebuilt as a self-hosted web app on the Frappe Framework.
• GnuCash · A free desktop double-entry accounting app for people and small businesses. It keeps your books in a file on your own machine.
• hledger · A Haskell plain-text accounting tool, Ledger-compatible, with CSV rules, a terminal UI, a web UI and a JSON API.
• Ledger · The original plain-text double-entry accounting tool: a C++ command-line reporter over a journal you write by hand.
• Manager.io · Free desktop accounting for Windows, Mac and Linux that keeps each business in a local SQLite file, with paid cloud and server editions of the same program.
• Paisa · A free, AGPL-licensed personal finance app that puts a web and desktop interface over a ledger, hledger or beancount journal on your own machine.

Personal finance

• Maybe Finance archived · An open-source personal finance and net-worth app, AGPL, whose company archived it in July 2025 to pivot to B2B forecasting.
• Microsoft Money shut · Microsoft's desktop personal finance program, 1991 to 2011, which kept your books in a local file and downloaded statements from banks.
• Mint shut · A free, ad- and offer-funded personal finance app from Intuit that aggregated a household's accounts, and was shut down in March 2024.
• Monarch Money · A subscription household finance app that aggregates every account through several data providers, with budgets, investments, forecasting and partner sharing.
• Quicken · The longest-running consumer finance software: a desktop data file on your machine (Quicken Classic) and a cloud budgeting app (Simplifi).
• Sure · A community AGPL fork of Maybe: a self-hosted personal finance app with many bank, broker and crypto connectors, an API and an MCP endpoint.
• Tiller · A subscription service that fills your own Google Sheets or Excel spreadsheet with daily bank and card transactions and balances.
• Wesabe shut · A privacy-minded web service for personal finances, 2006 to 2010, that lost to Mint and released its code when it closed.
• YNAB · A subscription zero-based budgeting app (You Need A Budget) with a public read/write API and an unusually loyal user base.

Bookkeeping services

• Bench acquired · An online bookkeeping and tax service for US small businesses that shut without notice on 27 December 2024 with its clients' books in a proprietary ledger, then was bought by Employer.com and reopened.
• Botkeeper acquired · AI bookkeeping automation sold to accounting firms per client entity; the company wound down in February 2026 and Xendoo bought and kept running its Infinite platform.
• Pilot · A US bookkeeping, tax and CFO service for startups and small businesses that now runs its books with an autonomous AI accountant and sells that engine, Meridian, to accounting firms.
• ScaleFactor shut · An Austin startup that sold automated bookkeeping to small businesses as AI-driven software, raised about $100M, and shut in 2020 after reports that much of the work was done by hand.
• Zeni · A bookkeeping, tax and fractional-CFO service for US startups, run by an in-house finance team with AI tooling, on top of the customer's QuickBooks Online.

Agents beside the ledger

• Basis · A hosted platform of AI agents that does accounting, tax and audit work inside accounting firms' existing ledgers and hands it back for review.
• Booke AI · A hosted AI bookkeeper that categorizes and reconciles bank transactions inside QuickBooks Online and Xero for small businesses and the firms that keep their books.
• Docyt pivoted · An AI accounting platform for multi-location businesses, hotels first, that began as an automation layer over QuickBooks and now sells itself as an AI-native ERP with its own ledger.
• Double (formerly Keeper) · Close and practice-management software for bookkeeping firms that syncs two ways with clients' QuickBooks Online and Xero and adds AI that drafts and proposes entries for review.
• Intuit AI agents for QuickBooks · The agents Intuit builds into QuickBooks Online itself (accounting, payments, finance, customer and others), now sold as 'Intuit Intelligence' features of each plan.
• Meridian (Pilot) · Pilot's AI platform for accounting firms that runs the month-end close inside the client's own QuickBooks Online or Xero and hands back books for the firm to review.
• Truewind · AI bookkeeping and close software for accounting firms and finance teams that posts entries to QuickBooks Online, Sage Intacct or Intuit Enterprise Suite, with the team reviewing exceptions.

Close and analytics

• BlackLine · Enterprise software for account reconciliation, the financial close, intercompany and invoice-to-cash, now sold as an 'agentic financial operations platform'.
• Fathom acquired · A cloud reporting, forecasting and consolidation tool that imports summary financials from small-business ledgers for advisers and owners.
• FloQast · Close management and compliance software built by accountants for mid-market and enterprise accounting teams, now with auditable AI agents.
• Numeric · A close management and finance data platform that keeps a synced copy of your ledger, reconciles it and drafts flux analysis, and now offers itself as a NetSuite replacement.
• Syft Analytics acquired · A cloud reporting, consolidation and forecasting tool over synced small-business ledgers and commerce data, now owned by Xero and partly built into Xero itself.

Capture

• Dext acquired · Dext captures receipts, bills and statements, extracts the data and publishes it into an accounting system such as Xero or QuickBooks Online.
• Hubdoc acquired · Hubdoc is Xero's document capture app: it reads bills, receipts and statements and creates transactions in Xero or QuickBooks Online with the document attached.

Spend management

• ApprovalMax · Multi-step approval workflows for bills, purchase orders, expenses and other documents before they post to Xero, QuickBooks Online or NetSuite.
• BILL · Accounts payable, receivables, cards and expense software for US small and mid-sized businesses, with its own payments network, which syncs into the customer's ledger.
• Brex acquired · Corporate cards, business banking, bill pay, travel and expense software in one platform, now part of Capital One.
• Expensify · Receipt scanning, expense reports, a corporate card and travel for individuals and small businesses, exported to the accounting system.
• Mercury · A fintech banking platform for startups and small businesses, with cards, bill pay, invoicing, treasury and, since September 2026, its own double-entry books.
• Ramp · Corporate cards, bill pay, procurement and travel with an accounting agent that codes spend and syncs it into your ERP.
• Stripe · Payments and financial infrastructure for internet businesses, with an API that most online companies use to take money.

Crypto accounting

• Bitwave · An enterprise back office for digital assets (subledger, payments, reporting) that added an open-source agent CLI and an MCP server in July 2026.
• CoinTracker · A hosted crypto portfolio tracker and tax calculator that syncs wallets and exchanges and produces tax forms.
• Cryptio · A hosted digital-asset subledger and data platform that reconciles wallets, exchanges and custodians and syncs journal entries into the ERP.
• Request Finance · Crypto and stablecoin invoicing, payables, payroll and expenses for web3 businesses, synced to Xero and QuickBooks.
• rotki · An open-source, local-first crypto portfolio and accounting app that keeps an encrypted database on your machine.

Unified accounting APIs

• Apideck · A pass-through unified API that reads and writes accounting, CRM, HR and other SaaS data on demand and says it stores none of it.
• Chift · A European unified API for accounting, invoicing, POS, e-commerce, payments, banking and PMS, covering the local ledgers that US players skip.
• Codat pivoted · A unified API for small-business accounting, banking and commerce data that in 2026 repositioned itself as an advisory intelligence platform for commercial banks.
• Merge · A unified API across HR, recruiting, CRM, ticketing, file storage, accounting and more, now with an MCP tool-calling layer for agents (Agent Handler), an LLM gateway and an employee AI product.
• Railz (FIS Accounting Data as a Service) acquired · An accounting, banking and commerce data API for lenders and fintechs, built by Railz and now sold by FIS as Accounting Data as a Service.
• Rutter · A unified API for accounting, commerce, payments and ads data, sold to fintechs and banks, now also embedding banking and payments inside ERPs.
• Unified.to · A real-time, zero-storage unified API and MCP server across 34 categories and 1,250+ integrations, billed by API call.

Bank aggregators

• Akahu · New Zealand's open finance API for bank data, payments and identity, with free personal apps for developers reading their own accounts.
• Akoya · A bank-owned network that lets fintechs pull consumer-permissioned account data from US financial institutions over one FDX-aligned API, without screen scraping.
• Finicity (Mastercard Open Finance) acquired · Mastercard's US open-finance API for reading consumers' and small businesses' bank, card and investment accounts, mainly for lending and account verification.
• GoCardless Bank Account Data pivoted · A PSD2 account-information API for EEA and UK banks, formerly the free Nordigen feed, closed to new sign-ups since July 2025.
• MX · A US financial data platform that aggregates, cleanses and categorises account data, sold mainly to banks and credit unions.
• OFX (Open Financial Exchange) archived · The 1997 file and protocol standard for bank, card and brokerage downloads, behind Quicken's QFX, Direct Connect and Web Connect, now frozen at version 2.3 under FDX.
• Plaid · The dominant US bank-data API: apps link a person's bank, card, loan and investment accounts through Plaid and read them as JSON.
• SimpleFIN · An open, read-only protocol, and a small paid bridge, that let a person hand an app a token to read their own bank accounts.
• Teller shut · A US bank-data API that called banks' own mobile-app APIs directly, with a free developer tier of 100 live connections, withdrawn in July 2026.
• Tink acquired · A European open banking platform, owned by Visa, that sells bank data, enrichment and account-to-account payments to banks, lenders and payment companies.
• TrueLayer · A UK and European open banking platform for Pay by Bank payments, payouts and account data, built on PSD2 and UK Open Banking.
• Yodlee acquired · The oldest financial-data aggregator, selling account aggregation, verification and data enrichment to banks, wealth firms and fintechs.

Integration platforms

• A2X · Software that turns marketplace and payment payouts (Amazon, Shopify, eBay, Etsy, Walmart, TikTok Shop, PayPal) into summarized entries in Xero, QuickBooks Online, NetSuite or Sage that match each bank deposit.
• Boomi · A long-running cloud integration platform with API management, master data (Data Hub), data integration and, since 2025, an agent builder and governance layer.
• Make · A hosted visual automation platform, formerly Integromat, where you build scenarios across 3,000+ apps, now with AI agents and an MCP server.
• MuleSoft acquired · Salesforce's enterprise integration and API platform (Anypoint), now also sold as a registry and governance layer for AI agents (Agent Fabric).
• n8n · A fair-code workflow automation platform you can run on your own machine or n8n's cloud, with AI agent nodes and an MCP server.
• Pipedream acquired · A hosted integration layer that gives developers and AI agents managed auth, more than 10,000 prebuilt tools and an MCP server over 3,000+ APIs.
• Workato · A cloud integration and automation platform that runs workflows (recipes) and AI agents across a company's SaaS apps, now sold as a control plane for enterprise AI.
• Zapier · A hosted automation service that moves data between 9,000+ apps through trigger-and-action workflows, now with MCP, an SDK and AI agents.

Connector frameworks

• Airbyte · An open-source (ELv2) ELT platform that moves data from 600+ sources into warehouses, lakes and, since 2025-26, AI agents.
• CData · Commercial drivers, sync tools and MCP servers that expose hundreds of business systems, including QuickBooks, Xero, MYOB and Sage, as SQL.
• dlt (dltHub) · An open-source Python library that loads data from APIs and files into a destination such as a local DuckDB file, with a paid platform to run it.
• Fivetran · A managed service that copies data from 700+ sources into your warehouse or lake, now merged with dbt Labs.
• Nango · A code-first integration platform that handles auth, syncs, actions and MCP tools for 1,000+ APIs, for products and their agents.
• Singer · An open specification for extraction scripts (taps) and loading scripts (targets) that pass JSON messages over standard output.
• Singer and Meltano · Singer is an open spec for connectors that emit JSON lines and checkpoint their progress. Meltano is the open-source CLI that runs Singer taps and targets.
• Steampipe · An open-source CLI that queries live APIs with SQL through plugins, without copying the data anywhere.

Data platforms

• Databricks · A lakehouse platform that stores data as open-format tables in cloud storage and runs SQL, Spark, machine learning and agents over them.
• dbt acquired · An open-source SQL transformation framework, plus a hosted platform, that turns raw warehouse tables into tested, documented models.
• DuckDB and MotherDuck · An embedded, open-source analytical database in a single file (DuckDB), plus a hosted serverless service built on it (MotherDuck).
• Snowflake · A cloud data warehouse, now called an AI data cloud, where large companies land and query data from every system they run.

Agent-native

• AccountsOS · A hosted AI accountant, Finn, that keeps the books for sole traders, small companies and accountancy practices, reachable through chat, MCP and a CLI.
• Bitwave Agentic · Bitwave's agent line: an open-source, agent-first double-entry CLI over local plain-text journals, plus an MCP server and SDK into Bitwave's hosted crypto accounting platform.
• Bitwave CLI · An open-source, agent-first double-entry CLI that keeps books in plain-text journal files on your machine, with an optional cloud workspace and commands for the hosted Bitwave platform.
• Books (dispatchlabs-ai) · A local-first, noninteractive command-line general ledger in SQLite, built for humans and software agents, with immutable postings and a hash-chained audit log.
• Digits MCP · A hosted, read-only MCP server over Digits' own AI-native general ledger, so outside agents can ask questions of the books but cannot change them.
• DualEntry MCP Server · A hosted MCP server for the DualEntry AI-native ERP, with eight read tools and five write tools built around draft, validate, approve, save.
• hledger MCP · A local MCP server that lets an AI assistant run hledger reports on, and optionally edit, your plain-text journal.
• Intuit Assist pivoted · Intuit's generative AI assistant, now a team of in-product AI agents under 'Intuit Intelligence', that works on QuickBooks books, payments, payroll and customers.
• JAX (Just Ask Xero) · Xero's in-product AI agent (its 'financial superagent') that answers questions, reconciles, chases payments and orchestrates other agents inside Xero.
• Merge Agent Handler · A hosted MCP gateway that gives AI agents per-user authenticated tools across about 330 third-party systems, with data-loss rules and call logs.
• QuickBooks Connector by Meridian · A free hosted MCP server that lets Claude, Cowork, ChatGPT and Codex read and write QuickBooks Online, read-only or read-write per company.
• QuickBooks Online MCP Server · Intuit's official open-source MCP server, run locally, that gives an AI client create, read, update and delete over a QuickBooks Online company.
• Sage Intacct AI Gateway · Sage's official MCP server and REST API layer that lets outside AI tools read Sage Intacct data under its roles and permissions, with the MCP held to read-only.
• Stripe Agent Toolkit · Stripe's official open-source tools and hosted MCP server that let AI agents read and write Stripe data through scoped keys or OAuth.
• Xero MCP Server · Xero's official open-source MCP server, which runs on your machine and lets an AI client read and write one Xero organisation directly.

Ledger and fact databases

• Amazon QLDB shut · A hosted, append-only, hash-chained ledger database from AWS, now shut down.
• Blnk · An open-source, double-entry ledger for fintech products, with reconciliation, PII tokenization and a managed cloud.
• Datomic · An immutable database of facts (datoms) with the database as a value and every past state queryable.
• Formance · An open-source programmable ledger for fiat and digital assets, with a paid platform of payment connectors, reconciliation, wallets and flows around it.
• Modern Treasury · A payments operations platform with an API for moving money and an immutable double-entry Ledgers product.
• TigerBeetle · An open-source database built only for double-entry transfers between accounts, designed for high throughput and strict safety.
• XTDB · An open-source bitemporal SQL database that keeps every version of every row, by when it was true and when it was recorded.