# an invoicing tool for freelancers

**Freelancer invoicing is crowded; the opening is in narrow workflows, not basic invoice creation.**

Confidence: high  ·  89 signals  ·  checked 2026-08-01

[Full report with live links](https://showsitsworks.com/idea/an-invoicing-tool-for-freelancers)

## Who is already building this

*From data*

- Midday is a large, active freelancer suite with invoicing, time tracking, file reconciliation, storage, and financial overview, and it has 14,717 stars with a last push on 2026-06-13.
  - [midday-ai/midday](https://github.com/midday-ai/midday) `github` — 2023-09-18
- Dolibarr is a much broader ERP/CRM that includes invoices and is explicitly aimed at businesses and freelancers; it has 7,467 stars and was last pushed on 2026-08-01.
  - [Dolibarr/dolibarr](https://github.com/Dolibarr/dolibarr) `github` — 2011-06-26
- Kimai is a very active time-tracking product that also generates invoices; it has 4,855 stars and a last push on 2026-08-02.
  - [kimai/kimai](https://github.com/kimai/kimai) `github` — 2016-10-20
- Invoicerr is a freelance-focused invoicing app with quotes, invoices, payment tracking, and secure signatures; it has 732 stars and was last pushed on 2026-07-28.
  - [invoicerr-app/invoicerr](https://github.com/invoicerr-app/invoicerr) `github` — 2025-06-27
- Invoice Builder is a desktop invoice and quotation app with PDF export for freelancers and small businesses; it has 461 stars and was last pushed on 2026-07-27.
  - [piratuks/invoice-builder](https://github.com/piratuks/invoice-builder) `github` — 2025-11-13
- Serverless Invoices is a browser-based invoicing tool for freelancers and small businesses; it has 542 stars and was last pushed on 2025-09-27.
  - [mokuappio/serverless-invoices](https://github.com/mokuappio/serverless-invoices) `github` — 2021-02-16
- Upcount is invoicing for freelancers and small businesses; it has 390 stars and was last pushed on 2026-05-18.
  - [namespace-ee/upcount](https://github.com/namespace-ee/upcount) `github` — 2019-02-04
- Several smaller projects are still active, including Pacioli with 64 stars and a last push on 2026-05-26, AyeCode Invoicing with 60 stars and a last push on 2026-07-29, Ardine with 28 stars and a last push on 2025-10-28, and Oreko with 22 stars and a last push on 2026-07-01.
  - [peerasak-u/pacioli](https://github.com/peerasak-u/pacioli) `github` — 2025-10-16
  - [AyeCode/invoicing](https://github.com/AyeCode/invoicing) `github` — 2017-01-09
  - [ArdineHQ/ardine](https://github.com/ArdineHQ/ardine) `github` — 2025-10-21
  - [orekoapp/oreko](https://github.com/orekoapp/oreko) `github` — 2026-01-30

## What people actually say

*From data*

- "I freelance part-time and wanted a very simple flow: start timer, stop timer, generate invoice." This is a founder describing the core simplicity he wanted in a freelancer billing tool.
  - [Show HN: Tymr – simple time tracking and invoicing for freelancers](https://news.ycombinator.com/item?id=46986477) `hackernews` — 2026-02-12
- "Most tools I tried felt team-oriented and heavy for my use case" This points to solo freelancers rejecting software that starts with team features.
  - [Show HN: Tymr – simple time tracking and invoicing for freelancers](https://news.ycombinator.com/item?id=46986477) `hackernews` — 2026-02-12
- "I built this because, as a freelancer myself, I find it hard to manage client billing and track hours manually." This is a direct complaint about manual billing and time capture.
  - [Show HN: I Simplified Time Tracking and Invoicing for Freelancer with FacturMe](https://news.ycombinator.com/item?id=45707920) `hackernews` — 2025-10-26
- "Most time-tracking apps feel overly complex, so I wanted to create something simpler" This is another first-person signal for a simpler solo workflow.
  - [Show HN: I Simplified Time Tracking and Invoicing for Freelancer with FacturMe](https://news.ycombinator.com/item?id=45707920) `hackernews` — 2025-10-26
- "every invoicing tool I tried was either bloated, expensive, or wanted to own my data." This is a strong complaint about bloat, price, and data control.
  - [Show HN: Invox – Open-source self-hosted invoicing for freelancers](https://news.ycombinator.com/item?id=46942499) `hackernews` — 2026-02-09

## People asking to be sold to

*From data*

- "I built this because, as a freelancer myself, I find it hard to manage client billing and track hours manually." That is a direct willingness-to-solve signal from a builder who felt the pain enough to ship.
  - [Show HN: I Simplified Time Tracking and Invoicing for Freelancer with FacturMe](https://news.ycombinator.com/item?id=45707920) `hackernews` — 2025-10-26
- "I freelance part-time and wanted a very simple flow: start timer, stop timer, generate invoice." That is a clear job-to-be-done with a minimal workflow.
  - [Show HN: Tymr – simple time tracking and invoicing for freelancers](https://news.ycombinator.com/item?id=46986477) `hackernews` — 2026-02-12
- "every invoicing tool I tried was either bloated, expensive, or wanted to own my data." That shows a buyer preference for lightweight, cheaper, self-controlled tools.
  - [Show HN: Invox – Open-source self-hosted invoicing for freelancers](https://news.ycombinator.com/item?id=46942499) `hackernews` — 2026-02-09
- "I created this little app out of pure necessity." This is explicit necessity-driven demand behind another invoicing project.
  - [Very simple quoting and invoicing for freelancers](https://news.ycombinator.com/item?id=10235089) `hackernews` — 2015-09-17

## Where the opening is

*Model estimate*

- The signals do not show a clean gap for basic invoice creation, quotes, or payment reminders; those are already present in multiple active tools.
  - [invoicerr-app/invoicerr](https://github.com/invoicerr-app/invoicerr) `github` — 2025-06-27
  - [mokuappio/serverless-invoices](https://github.com/mokuappio/serverless-invoices) `github` — 2021-02-16
  - [piratuks/invoice-builder](https://github.com/piratuks/invoice-builder) `github` — 2025-11-13
  - [Show HN: Invox – Open-source self-hosted invoicing for freelancers](https://news.ycombinator.com/item?id=46942499) `hackernews` — 2026-02-09
- The more specific gap appears to be a freelancer-first product that stays focused on a very small solo workflow instead of growing into time tracking suites, ERP, or team software.
  - [Dolibarr/dolibarr](https://github.com/Dolibarr/dolibarr) `github` — 2011-06-26
  - [kimai/kimai](https://github.com/kimai/kimai) `github` — 2016-10-20
  - [Show HN: Tymr – simple time tracking and invoicing for freelancers](https://news.ycombinator.com/item?id=46986477) `hackernews` — 2026-02-12
  - [Show HN: I Simplified Time Tracking and Invoicing for Freelancer with FacturMe](https://news.ycombinator.com/item?id=45707920) `hackernews` — 2025-10-26
- One concrete workflow gap is client-specific expense splitting for freelancers who work across multiple clients and need tax-aware invoicing; that complaint was explicit and not covered by the named invoicing tools in the signals.
  - [Problem: Freelancers can't categorize multi-client travel expenses for invoicing and tax purposes](https://github.com/muaddibco/RealWorldProblems/issues/1279) `githubissues` — 2026-04-02
- Another likely gap is data ownership plus local/offline usage for freelancers who do not want a cloud-heavy product; the signals mention self-hosted and local apps, but not a dominant tool that makes this the whole pitch.
  - [piratuks/invoice-builder](https://github.com/piratuks/invoice-builder) `github` — 2025-11-13
  - [m0g/zeithub](https://github.com/m0g/zeithub) `github` — 2019-01-07
  - [jbelelieu/atos](https://github.com/jbelelieu/atos) `github` — 2022-04-24
  - [Show HN: Invox – Open-source self-hosted invoicing for freelancers](https://news.ycombinator.com/item?id=46942499) `hackernews` — 2026-02-09
- The data also does not show a strong gap in e-signatures, recurring billing, or invoice PDFs, because those are already in existing products.
  - [invoicerr-app/invoicerr](https://github.com/invoicerr-app/invoicerr) `github` — 2025-06-27
  - [piratuks/invoice-builder](https://github.com/piratuks/invoice-builder) `github` — 2025-11-13
  - [Show HN: Invox – Open-source self-hosted invoicing for freelancers](https://news.ycombinator.com/item?id=46942499) `hackernews` — 2026-02-09
- There is no evidence here of a major gap around multilingual or regional tax compliance for freelancers in general, beyond unrelated API and e-invoicing infrastructure signals.
  - [npm: @sp-api-sdk/shipment-invoicing-api-v0](https://www.npmjs.com/package/@sp-api-sdk/shipment-invoicing-api-v0) `registries` — 2026-07-30
  - [npm: myinvois-client](https://www.npmjs.com/package/myinvois-client) `registries` — 2025-10-28
  - [npm: einvoicing](https://www.npmjs.com/package/einvoicing) `registries` — 2025-11-09
  - [npm: zatca-xml-js](https://www.npmjs.com/package/zatca-xml-js) `registries` — 2022-12-09

## How big the market might be

*Model estimate*

- This search found 12 named open-source projects, and 8 of them are still active.
  - [midday-ai/midday](https://github.com/midday-ai/midday) `github` — 2023-09-18
  - [Dolibarr/dolibarr](https://github.com/Dolibarr/dolibarr) `github` — 2011-06-26
  - [kimai/kimai](https://github.com/kimai/kimai) `github` — 2016-10-20
  - [invoicerr-app/invoicerr](https://github.com/invoicerr-app/invoicerr) `github` — 2025-06-27
  - [mokuappio/serverless-invoices](https://github.com/mokuappio/serverless-invoices) `github` — 2021-02-16
  - [piratuks/invoice-builder](https://github.com/piratuks/invoice-builder) `github` — 2025-11-13
  - [namespace-ee/upcount](https://github.com/namespace-ee/upcount) `github` — 2019-02-04
  - [m0g/zeithub](https://github.com/m0g/zeithub) `github` — 2019-01-07
  - [peerasak-u/pacioli](https://github.com/peerasak-u/pacioli) `github` — 2025-10-16
  - [AyeCode/invoicing](https://github.com/AyeCode/invoicing) `github` — 2017-01-09
  - [ArdineHQ/ardine](https://github.com/ArdineHQ/ardine) `github` — 2025-10-21
  - [orekoapp/oreko](https://github.com/orekoapp/oreko) `github` — 2026-01-30
- There are 4 first-hand complaints and 2 unsolved questions, but 0 stated wants, so the pain is real but not loudly quantified in community threads.
  - [Problem: Freelancers can't categorize multi-client travel expenses for invoicing and tax purposes](https://github.com/muaddibco/RealWorldProblems/issues/1279) `githubissues` — 2026-04-02
  - [Looking for someone who can build an AI- Accountant for a trucking business](https://community.n8n.io/t/looking-for-someone-who-can-build-an-ai-accountant-for-a-trucking-business/160686/13) `discourse` — 2026-06-17
  - [How should I describe the process of learning someone else's code? (In an invoicing situation.)](https://softwareengineering.stackexchange.com/questions/141068/how-should-i-describe-the-process-of-learning-someone-elses-code-in-an-invoic) `stackexchange` — 2012-03-22
  - [Database design, how to handle freelancers](https://softwareengineering.stackexchange.com/questions/256777/database-design-how-to-handle-freelancers) `stackexchange` — 2014-09-19
- The largest competitor in the set is Midday with 14,717 stars; the next biggest are Dolibarr with 7,467 stars and Kimai with 4,855 stars.
  - [midday-ai/midday](https://github.com/midday-ai/midday) `github` — 2023-09-18
  - [Dolibarr/dolibarr](https://github.com/Dolibarr/dolibarr) `github` — 2011-06-26
  - [kimai/kimai](https://github.com/kimai/kimai) `github` — 2016-10-20
- Community discussion exists but is scattered: matching threads were found on Hacker News, and the only named forum match in the count is community.n8n.io.
  - [Show HN: I've build a stupidly simple invoicing for freelancers and contractors](https://news.ycombinator.com/item?id=40220699) `hackernews` — 2024-05-01
  - [Freelancer Invoicing Software Comparison: Harvest Invoice, Wave Apps, and More](https://news.ycombinator.com/item?id=15659674) `hackernews` — 2017-11-09
  - [Show HN: Incomee 2.5 – Fast Invoicing for Freelancers](https://news.ycombinator.com/item?id=23082416) `hackernews` — 2020-05-05
  - [Show HN: BillDesk – Offline invoicing for freelancers (Windows and Mac)](https://news.ycombinator.com/item?id=49135745) `hackernews` — 2026-08-01
  - [Show HN: Tymr – simple time tracking and invoicing for freelancers](https://news.ycombinator.com/item?id=46986477) `hackernews` — 2026-02-12
  - [Show HN: FreelanceStation (macOS) Time Tracking and Invoicing for Freelancers](https://news.ycombinator.com/item?id=20314086) `hackernews` — 2019-06-29
  - [Show HN: Silk – Simple Invoicing for freelancers (macOS native)](https://news.ycombinator.com/item?id=44591550) `hackernews` — 2025-07-17
  - [Show HN: Momentum – Project Management and Invoicing for Freelancers](https://news.ycombinator.com/item?id=42897336) `hackernews` — 2025-02-01
  - [Show HN: Invox – Open-source self-hosted invoicing for freelancers](https://news.ycombinator.com/item?id=46942499) `hackernews` — 2026-02-09
  - [Show HN: I Simplified Time Tracking and Invoicing for Freelancer with FacturMe](https://news.ycombinator.com/item?id=45707920) `hackernews` — 2025-10-26
  - [InvoiceZap – invoicing for freelancers with automated payment reminders](https://news.ycombinator.com/item?id=48106356) `hackernews` — 2026-05-12
  - [Show HN: Anchor: Free Client Management and Invoicing App for Freelancers](https://news.ycombinator.com/item?id=8351164) `hackernews` — 2014-09-22
  - [E-Invoice – Simple Mobile Invoicing for Freelancers (iOS)](https://news.ycombinator.com/item?id=47246575) `hackernews` — 2026-03-04
  - [Show HN: Clerk – Simple invoicing for freelancers built with AI agents in 7 days](https://news.ycombinator.com/item?id=47159570) `hackernews` — 2026-02-25
  - [Show HN: A freelancer invoicing app that includes tracking time/tasks](https://news.ycombinator.com/item?id=28558021) `hackernews` — 2021-09-16
  - [Show HN: FreelanceStation (macOS) Time tracking and Invoicing for freelancers](https://news.ycombinator.com/item?id=20290225) `hackernews` — 2019-06-26
  - [Very simple quoting and invoicing for freelancers](https://news.ycombinator.com/item?id=10235089) `hackernews` — 2015-09-17
  - [What invoicing software do you use as a freelancer, and does it actually ...](https://www.reddit.com/r/software/comments/1m1amzn/what_invoicing_software_do_you_use_as_a) `tavily`
- Package-ecosystem usage is modest but present: @aws-sdk/client-invoicing has 14,961 downloads last month and @substrat-run/engine-invoicing has 4,413 downloads last month.
  - [npm: @aws-sdk/client-invoicing](https://www.npmjs.com/package/@aws-sdk/client-invoicing) `registries` — 2026-07-31
  - [npm: @substrat-run/engine-invoicing](https://www.npmjs.com/package/@substrat-run/engine-invoicing) `registries` — 2026-08-02
- There are also 603,882 Docker pulls for invoiceshelf/invoiceshelf, which suggests real usage even though the registry star count is only 5.
  - [docker: invoiceshelf/invoiceshelf](https://hub.docker.com/r/invoiceshelf/invoiceshelf) `registries`

## What could go wrong

*Model estimate*

- Basic invoicing is heavily competed, so a new tool risks being just another lightweight clone unless it has a sharper wedge than invoices, quotes, and PDFs.
  - [invoicerr-app/invoicerr](https://github.com/invoicerr-app/invoicerr) `github` — 2025-06-27
  - [mokuappio/serverless-invoices](https://github.com/mokuappio/serverless-invoices) `github` — 2021-02-16
  - [piratuks/invoice-builder](https://github.com/piratuks/invoice-builder) `github` — 2025-11-13
  - [namespace-ee/upcount](https://github.com/namespace-ee/upcount) `github` — 2019-02-04
  - [peerasak-u/pacioli](https://github.com/peerasak-u/pacioli) `github` — 2025-10-16
  - [AyeCode/invoicing](https://github.com/AyeCode/invoicing) `github` — 2017-01-09
  - [ArdineHQ/ardine](https://github.com/ArdineHQ/ardine) `github` — 2025-10-21
  - [orekoapp/oreko](https://github.com/orekoapp/oreko) `github` — 2026-01-30
- Several active competitors already bundle time tracking, expense management, payments, signatures, or accounting, which raises the bar for switching.
  - [midday-ai/midday](https://github.com/midday-ai/midday) `github` — 2023-09-18
  - [Dolibarr/dolibarr](https://github.com/Dolibarr/dolibarr) `github` — 2011-06-26
  - [kimai/kimai](https://github.com/kimai/kimai) `github` — 2016-10-20
  - [invoicerr-app/invoicerr](https://github.com/invoicerr-app/invoicerr) `github` — 2025-06-27
  - [piratuks/invoice-builder](https://github.com/piratuks/invoice-builder) `github` — 2025-11-13
  - [m0g/zeithub](https://github.com/m0g/zeithub) `github` — 2019-01-07
  - [AyeCode/invoicing](https://github.com/AyeCode/invoicing) `github` — 2017-01-09
  - [jbelelieu/atos](https://github.com/jbelelieu/atos) `github` — 2022-04-24
  - [ArdineHQ/ardine](https://github.com/ArdineHQ/ardine) `github` — 2025-10-21
- A freelancer-only positioning can be narrow; many products here already target freelancers plus small businesses, contractors, or teams.
  - [Dolibarr/dolibarr](https://github.com/Dolibarr/dolibarr) `github` — 2011-06-26
  - [kimai/kimai](https://github.com/kimai/kimai) `github` — 2016-10-20
  - [invoicerr-app/invoicerr](https://github.com/invoicerr-app/invoicerr) `github` — 2025-06-27
  - [mokuappio/serverless-invoices](https://github.com/mokuappio/serverless-invoices) `github` — 2021-02-16
  - [piratuks/invoice-builder](https://github.com/piratuks/invoice-builder) `github` — 2025-11-13
  - [namespace-ee/upcount](https://github.com/namespace-ee/upcount) `github` — 2019-02-04
  - [AyeCode/invoicing](https://github.com/AyeCode/invoicing) `github` — 2017-01-09
  - [ArdineHQ/ardine](https://github.com/ArdineHQ/ardine) `github` — 2025-10-21
  - [orekoapp/oreko](https://github.com/orekoapp/oreko) `github` — 2026-01-30
- Open-source and self-hosted options are common, so a paid product will need to beat free alternatives on convenience, trust, or workflow quality.
  - [mokuappio/serverless-invoices](https://github.com/mokuappio/serverless-invoices) `github` — 2021-02-16
  - [piratuks/invoice-builder](https://github.com/piratuks/invoice-builder) `github` — 2025-11-13
  - [m0g/zeithub](https://github.com/m0g/zeithub) `github` — 2019-01-07
  - [jbelelieu/atos](https://github.com/jbelelieu/atos) `github` — 2022-04-24
  - [jeroenvheel/MyClientBase](https://github.com/jeroenvheel/MyClientBase) `github` — 2011-07-03
  - [onebeat/FusionInvoice](https://github.com/onebeat/FusionInvoice) `github` — 2013-10-16
  - [Show HN: Invox – Open-source self-hosted invoicing for freelancers](https://news.ycombinator.com/item?id=46942499) `hackernews` — 2026-02-09
  - [orekoapp/oreko](https://github.com/orekoapp/oreko) `github` — 2026-01-30
- The evidence for unmet demand is mostly founder complaints, not a large body of buyer requests, so conversion may be harder than the number of competitors suggests.
  - [Show HN: Tymr – simple time tracking and invoicing for freelancers](https://news.ycombinator.com/item?id=46986477) `hackernews` — 2026-02-12
  - [Show HN: Invox – Open-source self-hosted invoicing for freelancers](https://news.ycombinator.com/item?id=46942499) `hackernews` — 2026-02-09
  - [Show HN: I Simplified Time Tracking and Invoicing for Freelancer with FacturMe](https://news.ycombinator.com/item?id=45707920) `hackernews` — 2025-10-26
  - [Very simple quoting and invoicing for freelancers](https://news.ycombinator.com/item?id=10235089) `hackernews` — 2015-09-17
- Regional tax and compliance requirements can fragment the market fast; the signals show invoicing APIs and e-invoicing standards, but not one universal freelancer workflow.
  - [npm: @sp-api-sdk/shipment-invoicing-api-v0](https://www.npmjs.com/package/@sp-api-sdk/shipment-invoicing-api-v0) `registries` — 2026-07-30
  - [npm: myinvois-client](https://www.npmjs.com/package/myinvois-client) `registries` — 2025-10-28
  - [npm: einvoicing](https://www.npmjs.com/package/einvoicing) `registries` — 2025-11-09
  - [npm: zatca-xml-js](https://www.npmjs.com/package/zatca-xml-js) `registries` — 2022-12-09

## What to do this week

*Model estimate*

- Build around one painful solo-freelancer job: start timer, capture work, generate invoice, and keep the flow extremely short.
  - [Show HN: Tymr – simple time tracking and invoicing for freelancers](https://news.ycombinator.com/item?id=46986477) `hackernews` — 2026-02-12
  - [Show HN: I Simplified Time Tracking and Invoicing for Freelancer with FacturMe](https://news.ycombinator.com/item?id=45707920) `hackernews` — 2025-10-26
- Differentiate on one narrow wedge such as client-specific expense splitting and tax-aware invoicing for multi-client freelancers.
  - [Problem: Freelancers can't categorize multi-client travel expenses for invoicing and tax purposes](https://github.com/muaddibco/RealWorldProblems/issues/1279) `githubissues` — 2026-04-02
- Offer local-first or self-hosted mode if data ownership is part of the pitch, since that theme already appears in the market.
  - [piratuks/invoice-builder](https://github.com/piratuks/invoice-builder) `github` — 2025-11-13
  - [m0g/zeithub](https://github.com/m0g/zeithub) `github` — 2019-01-07
  - [jbelelieu/atos](https://github.com/jbelelieu/atos) `github` — 2022-04-24
  - [Show HN: Invox – Open-source self-hosted invoicing for freelancers](https://news.ycombinator.com/item?id=46942499) `hackernews` — 2026-02-09
- Do not start with ERP, team features, or full accounting; those areas are already covered by bigger tools and will slow the product down.
  - [Dolibarr/dolibarr](https://github.com/Dolibarr/dolibarr) `github` — 2011-06-26
  - [kimai/kimai](https://github.com/kimai/kimai) `github` — 2016-10-20
  - [invoicerr-app/invoicerr](https://github.com/invoicerr-app/invoicerr) `github` — 2025-06-27
  - [AyeCode/invoicing](https://github.com/AyeCode/invoicing) `github` — 2017-01-09
  - [ArdineHQ/ardine](https://github.com/ArdineHQ/ardine) `github` — 2025-10-21
- Validate willingness to switch by targeting the people who already built or asked for simpler tools on HN, especially the founders behind Tymr, Invox, FacturMe, and the other Show HN invoicing posts.
  - [Show HN: BillDesk – Offline invoicing for freelancers (Windows and Mac)](https://news.ycombinator.com/item?id=49135745) `hackernews` — 2026-08-01
  - [Show HN: Tymr – simple time tracking and invoicing for freelancers](https://news.ycombinator.com/item?id=46986477) `hackernews` — 2026-02-12
  - [Show HN: Invox – Open-source self-hosted invoicing for freelancers](https://news.ycombinator.com/item?id=46942499) `hackernews` — 2026-02-09
  - [Show HN: I Simplified Time Tracking and Invoicing for Freelancer with FacturMe](https://news.ycombinator.com/item?id=45707920) `hackernews` — 2025-10-26
  - [InvoiceZap – invoicing for freelancers with automated payment reminders](https://news.ycombinator.com/item?id=48106356) `hackernews` — 2026-05-12
  - [E-Invoice – Simple Mobile Invoicing for Freelancers (iOS)](https://news.ycombinator.com/item?id=47246575) `hackernews` — 2026-03-04
  - [Show HN: Clerk – Simple invoicing for freelancers built with AI agents in 7 days](https://news.ycombinator.com/item?id=47159570) `hackernews` — 2026-02-25
  - [Show HN: A freelancer invoicing app that includes tracking time/tasks](https://news.ycombinator.com/item?id=28558021) `hackernews` — 2021-09-16
  - [Show HN: FreelanceStation (macOS) Time tracking and Invoicing for freelancers](https://news.ycombinator.com/item?id=20290225) `hackernews` — 2019-06-26
  - [Very simple quoting and invoicing for freelancers](https://news.ycombinator.com/item?id=10235089) `hackernews` — 2015-09-17
- If you want a sharper bet, prototype the expense-splitting workflow first, because that is the only clearly specific unmet need in the signals.
  - [Problem: Freelancers can't categorize multi-client travel expenses for invoicing and tax purposes](https://github.com/muaddibco/RealWorldProblems/issues/1279) `githubissues` — 2026-04-02

## Competitor strength

| Project | Stars | Downloads/mo | Activity |
|---|---:|---:|---|
| [midday-ai/midday](https://github.com/midday-ai/midday) | 14,717 | — | active |
| [Dolibarr/dolibarr](https://github.com/Dolibarr/dolibarr) | 7,467 | — | active |
| [kimai/kimai](https://github.com/kimai/kimai) | 4,855 | — | active |
| [invoicerr-app/invoicerr](https://github.com/invoicerr-app/invoicerr) | 732 | — | active |
| [mokuappio/serverless-invoices](https://github.com/mokuappio/serverless-invoices) | 542 | — | slow |
| [piratuks/invoice-builder](https://github.com/piratuks/invoice-builder) | 461 | — | active |
| [namespace-ee/upcount](https://github.com/namespace-ee/upcount) | 390 | — | active |
| [pranavp10/invoice-generator](https://github.com/pranavp10/invoice-generator) | 335 | — | dead |
| [m0g/zeithub](https://github.com/m0g/zeithub) | 64 | — | dead |
| [peerasak-u/pacioli](https://github.com/peerasak-u/pacioli) | 64 | — | active |
| [bigprof-software/online-invoicing-system](https://github.com/bigprof-software/online-invoicing-system) | 60 | — | dead |
| [AyeCode/invoicing](https://github.com/AyeCode/invoicing) | 60 | — | active |

## Domain names

- `freelancerinvoicing.com` — taken
- `freelancerinvoicing.io` — available
- `freelancer.com` — taken
- `getfreelancer.com` — taken

---

Sources searched: hackernews (30), github (20), githubissues (3), discourse (1), intent (none), stackexchange (2), registries (14), tavily (9), devto (10)

Generated by Shows Its Work — https://showsitsworks.com/idea/an-invoicing-tool-for-freelancers
Findings link to their sources. Estimates are marked as estimates.