Clams

Clams is now completely free to use.

No license to buy. Unlimited profiles, wallets, and transactions.

Bitcoin and Lightning accounting, all local and private.

https://clams.tech/downloads/

Bitcoin accounting software should connect to your wallets, track cost basis, and produce real books. Most of what's sold under that name does much less. Here's what we do differently, and why:

Clams is local-first.

Consumer tax tools and enterprise subledgers alike put your wallet history, balances, and addresses on their servers. Clams runs on a machine you control: a single binary, self-hosted or local. Your ledger, transactions, and balances never leave it.

Clams is unmetered.

Most tools charge by transaction count or wallet connection, which punishes the people who use Bitcoin most. A single Lightning node may forwards thousands of payments a month. Clams is a flat price, no matter how many wallets or how much volume.

Clams is Bitcoin-focused, not "crypto."

Generic tools treat Bitcoin as one coin among 20,000+, so xpubs, descriptors, multisig, and Lightning end up as afterthoughts or missing entirely. Bitcoin is our whole focus, not some feature you enable.

Clams is for people who use Bitcoin as money. And the businesses getting paid in, holding or spending BTC. If you trade across dozens of chains and just need one tax number a year, a generic tool will serve you better.

We built for one asset, on purpose.

Full comparison of pricing, Lightning support, cost basis, and data custody across the 10 tools people actually use in 2026 - https://clams.tech/blog/best-bitcoin-accounting-software/

Clams v1 is out of beta.

After two years of talking to bitcoiners, founders, and accountants, we kept hearing the same three problems:

You move Bitcoin between your own wallets and your tool books it as a sale. You overpay tax on coins you never sold. Clams matches transfers, on-chain and Lightning, and carries the cost basis across.

Your xpubs and full transaction history sit on someone else's server, one breach from exposure. Clams is local-first: run it on your laptop or self-host it on your own servers. We never see your data.

Your wallet balance matches but your books don't. Without double-entry, there's nothing to audit. Clams gives you real double-entry books with an audit trail behind every number.

We built Clams to fix all three, and a lot more.

Clams is paid software now: priced per person and per set of books, nothing else. No metering by wallet or transaction, no auto-renew, and reading your books stays free forever, even if you stop paying. Pay in Bitcoin over Lightning, or by card.

If you ran the v1 beta, it's free for you through the end of the year. Some of you offered to pay before we asked. We won't forget it.

Get started: clams.tech/downloads

Clams now syncs directly from phoenixd 🚀

Clams now supports the Liquid Network 🚀

L-BTC and Liquid assets now track alongside your on-chain and Lightning activity. One ledger, full cost basis, clean reports.

Move your BTC in or out of Liquid and Clams auto-categorizes it as a transfer. No phantom gains, no manual cleanup.

Clams v1.0.0-beta.13 is out

TL;DR:

• First-class USDT and USDC accounting
• Custom CSV transfer links for custodial movements
• Capital gains holding period terms
• Per-connection breakdown in the capital gains report
• Another round of Lightning on-chain accounting correctness fixes.

Full notes - https://clams.tech/blog/release-v1-0-0-beta-13/

We put together a comprehensive list of all Clams features on our site as we had some feedback. Some highlights:

1. Reconciles Lightning channels with on-chain activity

2. Auto-matches self-transfers, no double-counting

3. No caps on wallets, transactions, or reports

4. Drivable by scripts and agents via CLI

5. Runs fully local after sync

View the full list here - https://clams.tech/features/

With 2 Lightning nodes connected, Clams shows a modest capital gain. I connect the xpub for an on-chain wallet and the River exchange data - It's now a capital loss.

At the start of the demo, sats moving between our wallets appear to be spends and receives. Without the full picture, there's no way to know they're transfers.

Adding the on-chain wallet and the River CSV lets Clams track the bitcoin end to end:

River Exchange → on-chain wallet → lightning nodes.

Disposals get recategorized as transfers. In other words, they are no longer taxable events. The average cost basis went up too. River has the actual purchase prices, not inferred ones from on-chain timestamps.

Higher cost basis + transfers reclassified = realized gains flip from positive to negative.

"But I don't want to hand over my xpub to get a more accurate cost basis."

You don't. Your data never leaves your machine. You can connect your own Electrum, Esplora or Bitcoin RPC server for on-chain lookups.

More connections in Clams doesn't mean more trust. It means fewer false taxable events and an accurate cost basis.

Our YouTube channel has a new Getting Started playlist to walk you from installation to advanced workflows.

More videos coming. If there's a specific workflow you want covered, let us know.

https://www.youtube.com/playlist?list=PLkPrqEMuJt52fyIqotBkCHnLeeLHit35s

Accounting for every millisat on a Lightning node is hard. Multiple nodes with different implementations and tens of thousands of transactions? Even harder.

Hook your Core Lightning & LND nodes up to Clams, pair with your favorite agent, and simply talk to your books.

Install Clams and onboard in 2 minutes with Claude Desktop

One command to install Clams + Agent Skills.

Open Claude to sign in. Then set your currency, cost basis method, and onchain source.

Done.

Here is a guide for anyone that wants this set up:

https://clams.tech/blog/private-ai-bitcoin-accounting/

Private AI meets Bitcoin accounting.

+ opencode Clams CLI.

Ask questions about your books without exposing your data.

Maple AI encrypts your data before it leaves your device and processes it in secure hardware that even they can't see into. No training on your data, no third-party sharing.

Opencode connects to Maple and talks to Clams CLI. Your books stay private.

We tried all the models on Maple and Kimi K2.5 was our favorite. It is fast and makes few errors, especially when paired with the Clams agent skills - https://github.com/clams-tech/skills

We'll put a setup guide together for anyone interested. In the meantime, you can download Maple and opencode using these links:

https://trymaple.ai/downloads

https://opencode.ai

Clams v1.0.0-beta.8 is out.

is now a first-class connection. Import your Account Activity CSV directly.

New: manual cost basis overrides. Sometimes your imported data doesn't reflect the real cost basis. Incomplete purchase records, missing wallets. Now you can set it directly and see it reflected in your capital gains reports.

Our Custom connection feature has been improved to make it more flexible. Better support for exchanges with unusual CSV layouts. More edge cases covered, fewer workarounds. More details in the release notes.

Also in this release: better CLI error messages, offline auth validation, smarter on-chain transfer matching for custodial imports, and unique workspace label enforcement.

Full release notes: http://clams.tech/blog/release-v1-0-0-beta-8/

Cheers, Clams Team

Wallet to report in under a minute. Here's a quick look at the Clams CLI.

Connect a wallet, sync transactions, generate journal entries, and print reports. All from your terminal.

Lightning volume crossed an estimated $1B/month in 2025 (see latest

report). More exchanges and mining pools are running nodes.

We put together some thoughts on why Lightning accounting is its own discipline.

https://clams.tech/blog/lightning-network-accounting/

We've had a few people reach out asking how to import transactions from wallets and exchanges that Clams doesn't natively support.

Clams has a "Custom" connection type built exactly for this. You can import any CSV and map the columns to match what Clams expects.

The easiest path: use an LLM to help you create a reusable mapping so future imports are one click.

We put together a step-by-step guide to walk you through it:

https://clams.tech/blog/custom-connections-guide/

As always, keep the feedback coming,

Cheers.

We just shipped the Clams REST API.

Here's a full walkthrough covering auth, wallet connections, syncing, journal processing, annotations, and reports:

https://clams.tech/blog/building-with-the-clams-api/

Our API docs are machine-readable by design. Point Claude Code, Codex or Open Code at the OpenAPI specs and let it build.

Some ideas: → Portfolio dashboards and BI integrations → Automated capital gains and tax reporting → Multi-client accounting from a single instance → Custom workflows on top of your own Bitcoin books

Get started: https://clams.tech/server

Try it out, break things, and reach out via the built-in feedback endpoint.

Or shoot us an email to [email protected]

Happy building!

We just shipped the Clams REST API.

Here's a full walkthrough covering auth, wallet connections, syncing, journal processing, annotations, and reports:

https://clams.tech/blog/building-with-the-clams-api/

Our API docs are machine-readable by design. Point Claude Code, Codex or Open Code at the OpenAPI specs and let it build.

Some ideas: → Portfolio dashboards and BI integrations → Automated capital gains and tax reporting → Multi-client accounting from a single instance → Custom workflows on top of your own Bitcoin books

Get started: https://clams.tech/server

Try it out, break things, and reach out via the built-in feedback endpoint.

Or shoot us an email to [email protected]

Happy building!

Clams V1 Beta is live 🚀

Bitcoin accounting infrastructure you can deploy, integrate, and build on. Run it locally. Deploy it anywhere.

Our core logic has been entirely rewritten in Rust. Huge performance gains, especially for high-volume Lightning nodes. One install, then choose your interface: CLI or Server.

Bring your own node: Electrum, Esplora, or Bitcoin RPC. Full Tor support. Then connect and sync: on-chain wallets (xpub and descriptor support), Lightning nodes, addresses, custom CSV/JSON imports, and NWC wallets.

Generate capital gains reports, balance sheets, and portfolio summaries. Full audit records with canonical data: invoices, payments, trades, UTXOs, etc. Exchange rates in 19 fiat currencies. Smart tagging you refine over time.

Enterprise-ready from day one. Workspaces and profiles. Role-based access control. Audit trail. Multi-user management. Whether you're a solo operator or an accounting firm, Clams scales with you.

Clams CLI: your Bitcoin books, automated. Full accounting from your terminal. Automate reconciliation, reporting, and exports. Pipe output to other tools. Schedule jobs with cron. Hand control to Claude Code, Codex, or Open Code.

Clams Server: self-host your Bitcoin books anywhere. Expose REST API and CLI access to your team. Connect multiple clients to a single instance. Full role-based access control. Or skip the ops and use Clams Cloud as your hosted backend.

Built for Bitcoin businesses, miners, exchanges, Lightning service providers, accounting firms, and developers.

Learn more: https://clams.tech/blog/v1-beta/ Get started: https://clams.tech/downloads/

Cheers, Clams Team

Very cool resource here from

Honored to be included among a bunch of great Bitcoin products.

Check it out!

https://www.bitcoinproducts.com/

Cheers

!

New guide: How to import your Phoenix Wallet transactions into Clams for accurate cost basis tracking.

Covers Lightning + on-chain, and includes an AI prompt to automate the CSV conversion.

If you're using Phoenix and need proper accounting reports, this will save you hours.

https://clams.tech/blog/phoenix-wallet-bitcoin-accounting-import-guide/

We’ve been busy and still a lot to do, but we are making great progress. Looking forward to getting these releases out.

After a year of building, with 2,500+ people now using Clams Desktop, we're ready to share what we're working on.

We started with Desktop. Now we're building the Bitcoin accounting layer.

Let's explain 🧵

New guide: Connect your Unchained Vault to Clams for seamless Bitcoin accounting.

Step-by-step setup → https://clams.tech/blog/unchained-vault-bitcoin-accounting-setup-guide/

Clams has a new look.

Fresh logo, typography, and color palette across our app and website.

Same mission: purpose-built Bitcoin accounting that's private, precise, and audit-ready.

http://clams.tech

New post: First wallet guide in our series!

Thorough guide on connecting your singlesig and multisig Sparrrow wallets to Clams.

More wallet guides coming soon 👇

https://clams.tech/blog/sparrow-wallet-bitcoin-accounting-setup-guide/

Crypto accounting platforms support 20,000 coins but can't handle Lightning.

That's why we built Bitcoin-only accounting software that actually works for Bitcoiners.

https://clams.tech/blog/purpose-built-bitcoin-only-vs-crypto-accounting/

Quick update on what we’ve been up to!

We’re gearing up for our V1 release after just over a year in beta. The entire app logic has been rewritten in Rust to boost performance and scalability. We’re also rolling out a full design and brand overhaul across the app and all our websites.

Huge thanks to all the beta testers who shared feedback—it’s been incredibly helpful and truly appreciated. We’re excited to get V1 into your hands very soon!

In the meantime, you can download the latest beta release here- https://clams.tech/downloads

Stacking sats to your multisig? Using a vault with Unchained?

Here's how to quickly add your descriptor to Clams with a little help from Sparrow Wallet:

Connecting your XPubs to Clams couldn't be easier.

Here is how that looks when we pair the app with Sparrow Wallet:

Get started - https://clams.tech/downloads/

https://blog.clams.tech/on-privacy/

New in Clams v0.4: V4V Modal 🤑

While in beta, all Clams features are completely free, and you can now support us with sats! ⚡

After beta, we’ll introduce a yearly subscription, with discounts for beta testers. Join our Discord to help improve the app! 🚀

🚀 Clams v0.4 is here! 🚀

Introducing the Exports Widget – Easily generate Capital Gains Reports & Journal Entries Exports in just a few clicks.

Here's how it works:

👀 Learn more: https://blog.clams.tech/release-v0-4

🔗 Get started: https://clams.tech/downloads

For a Bitcoin-only solution that protects your privacy by keeping all your data on your device, consider Clams.

Learn more at https://clams.tech

New in Clams v0.3: Cashu NIP60 Connection! ⚡

Built during a

hackathon in Berlin, this feature lets you sync Cashu ecash wallets hosted on Nostr relays.

Shoutout to the

team for adding NIP60 support! 🙌

Here’s how you can add the connection in Clams:

👀 Learn more: https://blog.clams.tech/release-v0-3-0/#cashu-nip60-connection

🔗 Download now: https://clams.tech/downloads

Filter Widget improvements in Clams v0.3 🎉:

New tag filtering! Easily filter transactions using custom or default tags.

Multi-select dropdowns: Filter by multiple accounts or tags at once.

Here is how that looks with an nostr:nprofile1qyt8wumn8ghj7etyv4hzumn0wd68ytnvv9hxgtcppemhxue69uhkummn9ekx7mp0qydhwumn8ghj7mn0wd68ytf39ehxymewv9hxwctwdyhxxmcpr4mhxue69uhkummnw3ez6ur4vgh8wetvd3hhyer9wghxuet5qy08wumn8ghj7mn0wd68yttsw43zuam9d3kx7unyv4ezumn9wshszynhwden5te0wp6hyurvv4cxzeewv4esz9rhwden5te0wfjkccte9ejxzmt4wvhxjmcpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhsz9nhwden5te0wfjkccte9ehx7um5wghxyctwvsq3wamnwvaz7tmjv4kxz7fwdehhxarj9e3xzmny9uq3vamnwvaz7tmjv4kxz7fwwpexjmtpdshxuet5qyvhwumn8ghj7un9d3shjtnndehhyapwwdhkx6tpdshsqgzx2l0739jmazvq4yc8908mtev6v5fygpkmp7qey90w0zay0y6t8ccesg0j wallet connected via

:

🔗 Download now: https://clams.tech/downloads

New in Clams v0.3: DB Backup and Restore!

Easily back up your data with a snapshot feature and restore previous versions anytime. Keep your data safe and organized!

💡 Learn more: https://blog.clams.tech/release-v0-3-0/#db-backup-and-restore

🔗 Download now: https://clams.tech/downloads

New in Clams v0.3: Transaction Details!

View key details like timestamps, txids, and balance changes. Add tags, notes, and customize accounts for better organization and insights.

💡 Learn more: https://blog.clams.tech/release-v0-3-0/#transaction-details

🔗 Download now: https://clams.tech/downloads

Version 0.3 of Clams is here! 🚀

Say hello to Custom Imports—now you can bring any Bitcoin data into Clams with ease.

💡 Learn more: https://blog.clams.tech/release-v0-3-0/

🔗 Download now: https://clams.tech/downloads

We just added support for BIP-353 usernames to Remote.

TLDR; paste what looks like a lightning address and pay to a BOLT12 offer encoded in DNS TXT records.

Here is how that works:

A simple UI to decode BOLT12 offers - https://github.com/clams-tech/bolt12-decoder-app

Handy for any devs working on BOLT12 stuff. We will host it on a Clams domain soonish.

For a long time we considered extending Remote to support some of our favorite Core Lightning plugins.

Our latest releases offer a UI for the CLBOSS and BOLT12-prism plugins. Heres a quick run through what you can do with both: