Updated August 2026
    Contested · 50/100

    Open Source Altro: 96 Projects Compared

    Every open-source altro project we track, scored on maintenance, momentum and licence — so you can tell the live competitors from the abandoned repositories.

    TL;DR • open source altro • as of August 2026

    Altro has 96 open-source implementations in this dataset, of which 0 show real momentum and 0 are dormant or abandoned. The leader is 11ty with 0 stars against a category median of 0 — roughly 0x the typical project. Saturation score 50/100: Contested. Several maintained alternatives exist, but no one owns the category.

    96
    Implementations
    0
    Real momentum
    0
    Dormant or dead
    0%
    Maintained rate

    Should you build a altro product?

    Contested · 50/100
    96 implementations · leader 0x the median

    Winnable, but differentiation is not optional. Pick one underserved segment and be visibly better for it rather than competing feature-for-feature with a free tool.

    The practical test in this category: 11ty is the reference implementation at 0 stars, and 0 of 96 projects are still shipping. A buyer evaluating you will find at least one maintained free option, so your pricing and positioning have to answer "why not self-host 11ty?" in the first minute.

    The projects that actually compete

    • Awesome-Selfhosted — replaces Other lists of free / software315k stars · 0 commits/12mo
    • Hugo — replaces Static website generator90k stars · 0 commits/12mo
    • Font-Awesome — replaces Icons77k stars · 0 commits/12mo
    • Prometheus — replaces Time-series database66k stars · 0 commits/12mo
    • Astro — replaces Static website generator62k stars · 0 commits/12mo

    All 96 open-source altro projects

    Awesome-Selfhosted

    Alternative to Other lists of free / software

    315k

    A list of Free Software network services and web applications which can be hosted on your own servers

    Actively maintained
    Real momentum

    Hugo

    Alternative to Static website generator

    90k
    Actively maintained
    Real momentum

    Font-Awesome

    Alternative to Icons

    77k
    Actively maintained
    Real momentum

    Prometheus

    Alternative to Time-series database

    66k
    Actively maintained
    Real momentum

    Astro

    Alternative to Static website generator

    62k

    The web framework for content-driven websites. ⭐️ Star to support our work!

    Actively maintained
    Real momentum

    Remotion

    Alternative to Programmatic videos

    57k
    Actively maintained
    Real momentum

    Jekyll

    Alternative to Static website generator

    52k
    Actively maintained
    Real momentum

    Cal.com

    Alternative to Scheduling tool

    48k

    Scheduling infrastructure for absolutely everyone.

    Actively maintained
    Real momentum
    MIT

    Milvus

    Alternative to Vector database

    46k
    Actively maintained
    Real momentum

    Insomnia

    Alternative to API development

    40k
    Actively maintained
    Real momentum

    Drone

    Alternative to Continuous integration

    38k
    Actively maintained
    Real momentum

    OpenAssistant

    Alternative to Artificial intelligence chatbot/ LLM

    37k
    Abandoned

    Uppy

    Alternative to File uploader

    31k
    Actively maintained
    Real momentum

    Jenkins

    Alternative to Continuous integration

    27k
    Actively maintained
    Real momentum

    Gitlab

    Alternative to Code hosting & collaboration

    25k
    Actively maintained
    Real momentum

    super-productivity

    Alternative to To-do app, Kanban board

    22k
    Actively maintained
    Real momentum

    Tabler-Icons

    Alternative to Icons

    22k
    Actively maintained
    Real momentum

    Sonic

    Alternative to Search

    21k
    Actively maintained
    Real momentum

    11ty

    Alternative to Static website generator

    20k

    A simpler site generator. Transforms a directory of templates (of varying types) into HTML.

    Actively maintained
    Real momentum
    MIT

    Awesome open-source alternatives to SaaS

    Alternative to Other lists of free / software

    20k

    Awesome list of open-source startup alternatives to well-known SaaS products 🚀

    Slowing down
    MIT

    BookStack

    Alternative to Knowledge Bases

    19k

    NOW MANAGED ON CODEBERG

    Actively maintained
    Real momentum
    MIT

    Zola

    Alternative to Static website generator

    17k
    Actively maintained
    Real momentum

    Weaviate

    Alternative to Vector database

    17k
    Actively maintained
    Real momentum

    Luckysheet

    Alternative to Smart spreadsheet

    17k
    Dormant

    Tantivy

    Alternative to Search

    16k
    Actively maintained
    Real momentum

    APITable

    Alternative to Smart spreadsheet

    16k

    🚀🎉📚 APITable, an API-oriented low-code platform for building collaborative apps and better than all other Airtable open-source alternatives.

    Slowing down
    AGPL-3.0

    CapRover

    Alternative to Platform-as-a-Service/ PaaS, Platform as a Service / PaaS

    15k

    Scalable PaaS (automated Docker+nginx) - aka Heroku on Steroids

    Actively maintained
    Real momentum

    FauxPilot

    Alternative to AI code completion

    15k
    Abandoned

    Logto

    Alternative to User authentication

    14k
    Actively maintained
    Real momentum

    Bitwarden

    Alternative to Password manager

    14k

    Bitwarden client apps (web, browser extension, desktop, and cli).

    Actively maintained
    Real momentum

    Pelican

    Alternative to Static website generator

    13k
    Slowing down

    doccano

    Alternative to Annotation

    11k
    Slowing down

    hyperdx

    Alternative to Monitoring/Observability

    9.9k
    Actively maintained
    Real momentum

    ChatRWKV

    Alternative to Artificial intelligence chatbot/ LLM

    9.5k

    ChatRWKV is like ChatGPT but powered by RWKV (100% RNN) language model, and open source.

    Actively maintained
    Real momentum
    Apache-2.0

    highlight

    Alternative to Session replay and analytics

    9.4k
    Actively maintained
    Real momentum

    activeloopai/deeplake

    Alternative to Vector database

    9.2k

    Deeplake is AI Data Runtime for Agents. It provides serverless postgres with a multimodal datalake, enabling scalable retrieval and training.

    Slowing down
    Apache-2.0

    Webstudio

    Alternative to Website builder

    8.9k
    Actively maintained
    Real momentum

    IDURAR ERP CRM

    Alternative to ERP

    8.7k
    Actively maintained
    Real momentum

    Crater

    Alternative to Invoicing

    8.3k
    Abandoned

    RemixIcon

    Alternative to Icons

    8.3k
    Slowing down

    Bootstrap

    Alternative to Icons

    8.1k

    Official open source SVG icon library for Bootstrap.

    Actively maintained
    Real momentum
    MIT

    Coroot

    Alternative to Monitoring/Observability

    7.9k

    Coroot is an open-source observability and APM tool with AI-powered Root Cause Analysis. It combines metrics, logs, traces, continuous profiling, and SLO-based alerting with predefined dashboards and inspections.

    Actively maintained
    Real momentum
    Apache-2.0

    Spacebar

    Alternative to Team communication, Chat & Team Communication

    6.7k
    Slowing down

    Beehive

    Alternative to Integromat

    6.5k

    A flexible event/agent & automation system with lots of bees 🐝

    Abandoned
    AGPL-3.0

    Openblocks

    Alternative to Internal tools

    6.2k
    Abandoned

    Redmine

    Alternative to Bug tracking

    6.0k
    Actively maintained
    Real momentum

    JanusGraph

    Alternative to Graph database

    5.8k
    Actively maintained
    Real momentum

    Showing 48 of 96

    How to compete when a free version already exists

    Why 'someone already built it' is the wrong conclusion

    Existence is not competition. A project competes with you only if it is maintained, findable, deployable by your buyer and licensed for their use. Most projects fail at least one of those tests. Run all four before you shelve an idea — or before you assume you have a clear run.

    • Maintained: commits in the last twelve months and a recent release.
    • Findable: your buyer can discover it without knowing the project name.
    • Deployable: the buyer's team can actually run it without a platform engineer.
    • Licensed: the licence permits the use your buyer needs.

    How stars mislead founders

    Stars are a lifetime counter with no decay, so a project abandoned in 2022 still looks like a leader in 2026. In this dataset 222 projects are dormant, abandoned or archived, and several of them sit in the top decile by stars. Sort by momentum and commit activity instead — popularity tells you the project was once interesting, maintenance tells you whether it will still be there when your customer needs a bug fixed.

    The self-hosting cost buyers forget to count

    When a prospect says 'we could just self-host the free one', they are usually comparing your price against zero. The real comparison is your price against hosting, upgrades, backups, security patching, integration work and the engineer hours behind all of it. Quantifying that number is the single most effective response to a free-alternative objection — and it is more persuasive coming with a spreadsheet than with a feature list.

    • Infrastructure: compute, storage, backups, monitoring.
    • Upgrades: breaking releases, migration work, dependency drift.
    • Security: patching, access control, audit trails, compliance evidence.
    • Opportunity cost: engineer time not spent on your buyer's actual product.

    Licences decide business models

    Founders treat licensing as a legal footnote and then discover it dictates strategy. Permissive licences allow closed commercial forks, which is why so many managed services exist around MIT and Apache projects — and also why your differentiation cannot be the code itself. Copyleft licences, especially AGPL, remove the closed-wrapper option entirely, which reduces competition but restricts you too. Source-available licences exist precisely to stop the wrapper business.

    Open source competition: common questions

    How do I know if my startup idea already exists as open source?

    Search this database by category and by the commercial product you would replace. It covers 1665 projects across 130 categories, each mapped to the paid tool it substitutes. If your category shows a "Crowded" verdict, a maintained free version almost certainly exists and your positioning has to account for it.

    Does an open-source alternative mean I should not build my product?

    No. It means free is your price anchor. Plenty of large companies were built next to a good open-source project — the ones that failed were the ones selling the same job at a price the free tool made indefensible. Find the part of the job the project deliberately does not do, and sell that.

    What does the saturation score mean?

    Each category gets a 0–100 score built from three inputs: how many implementations exist, what share of them are still actively maintained, and how far ahead the leading project is compared with the category median. 62+ is Crowded, 38–61 Contested, under 38 Open. 11 categories are Crowded and 88 are Open.

    How is 'real momentum' calculated?

    A project has momentum when it committed code in most of the last twelve months, shipped a release recently and is not archived. 911 of 1665 projects qualify. This is the single most useful filter here — it strips out the popular-but-dead repositories that make a category look more competitive than it is.

    Can I use an open-source project commercially?

    It depends entirely on the licence. MIT, Apache and BSD let you build and sell closed products on top. GPL and AGPL require derivative work to stay open, and AGPL extends that to network use, which blocks most SaaS wrappers. BSL, SSPL and Commons Clause are source-available, not open source, and usually restrict competing commercial use outright.

    Validate before you build in a contested category

    IdeaProof scores your idea against real competitors, market size and 1,000+ documented startup failures in about two minutes.

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