Dev tools · alternatives · 2026

24 alternatives to Extend by Auth0

Let your customers write the rules

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Extend by Auth0 launched in 2018; newer entries below may have overtaken it.

1. 1
   Auth0 Extend▲13

   A new way to extend SaaS applications beyond Webhooks

   2017 · auth0.com · its alternatives →

2. 2
   GitLive▲209

   Extend Git with real-time collaborative superpowers

   2021 · git.live · its alternatives →

3. 3EE
   ExtenduS – enabling customization and integration of SaaS platforms▲6

   2020 · extendus.io · its alternatives →

4. 4
   extensions.af▲568

   A site to find the dopest Chrome extensions out there

   2017 · its alternatives →

5. 5
   Merge 2.0▲497

   Launch hundreds of integrations in days for free

   2022 · merge.dev · its alternatives →

6. 6
   Reforge Extension▲545

   An expert by your side in the places you work

   2024 · chromewebstore.google.com · its alternatives →

7. 7
   Paragraph (Integrations as Code)▲142

   Ship user-facing SaaS integrations for your app 7x faster

   2024 · useparagon.com · its alternatives →

8. 8
   SaaSBold▲276

   Full-stack SaaS boilerplate and starter kit

   2024 · saasbold.com · its alternatives →

9. 9
   AccessOwl 2.0▲369

   Discover and manage your teams SaaS access

   2023 · accessowl.com · its alternatives →

10. 10
    Scriptable.run, make your product extendable by anyone.▲38

    Run 3rd party code inside your product with one line of code. Fast & secure.

    2023 · scriptable.run · its alternatives →

11. 11GE
    Gigacatalyst – Extend your SaaS with an embedded AI builder▲61

    Hi HN, I’m Namanyay from Gigacatalyst (link: https://gigacatalyst.com/). Gigacatalyst allows sales, CS, and users to build one-off features, so your SaaS can support long-tail customer workflows and engineers aren’t pulled away from the roadmap. When you sell software to large businesses, you realize that each customer needs their own workflow and features. Traditionally, this either means long engineering roadmaps or the customers end up using workarounds. But what if everyone could build their critical missing features just by talking to an AI? That’s what we do at…

    May 2026 · its alternatives →

12. 12
    Extend your platform via custom code with Deno Subhosting▲37

    Hey all, Andy from the Deno team here. We're excited to share with you Deno Subhosting, an easy way to extend your platforms functionality by securely running untrusted JavaScript written by your users. When we first launched Deno Deploy in 2021, we were surprised at the volume of requests from companies about getting access to the APIs needed to run Deno Deploy. Many companies wanted to give their users the ability to write custom logic in their app, but setting this up in the cloud presents security concerns and a ton of infra work/maintenance. We realized that there was an…

    2023 · deno.com · its alternatives →

13. 13
    Saas.do – Build powerful webapplications without coding▲53

    No-Code Plattform zur schnellen Digitalisierung und Automatisierung von Unternehmensprozessen. Flexibel, skalierbar und ohne Programmieraufwand.

    2016 · saas.do · its alternatives →

14. 14
    servr▲202

    Enrich your app by serving custom domains

    2020 · its alternatives →

15. 15
    Deno Subhosting▲82

    Allow developers to extend your product with custom code

    2023 · deno.com · its alternatives →

16. 16
    Extra▲3

    Open-source AI agent infrastructure for SaaS products

    Aug 2026 · github.com · its alternatives →

17. 17
    WoahAuth▲33

    Add third-party integrations to your SaaS

    2023 · its alternatives →

18. 18
    Nextacular▲124

    Quickly launch multi-tenant SaaS applications

    2022 · nextacular.co · its alternatives →

19. 19
    We built an open-source LaunchDarkly alternative for B2Bs▲114

    Hey HN, Nir, Gal and Tomer here. Last week, we open-sourced Enrolla (https://github.com/enrolla/enrolla) - feature management for SaaS companies. It makes it easy for developers to control how their product behaves for customers in different pricing tiers. So things like which features are enabled for whom, rate limits and seat limits, but also your customer secrets (with end-to-end encryption), and other configurations. After 15 years of working together at various companies, where we rebuilt the same SaaS foundation layer again and again - we wanted to create something…

    2023 · enrolla.io · its alternatives →

20. 20CC
    Create Chrome Extensions for internal use▲47

    Develop, preview, and ship browser extensions for every browser.

    2021 · extension.dev · its alternatives →

21. 21
    My failed-wannabe-saas-startup project Beyondpad going open source▲51

    2015 · github.com · its alternatives →

22. 22
    Extended▲7

    Talk to any website, change it. 10x chrome extensions.

    2025 · tryextended.com · its alternatives →

23. 23
    I open-sourced my Go and Next B2B SaaS Starter (deploy anywhere, MIT)▲83

    Hi HN, I'm Mohammed, a technical founder who loves shipping and giving back to the community. I'm open-sourcing the full-stack engine that powers my B2B product, apflow.co. What it is: A production B2B starter with a Go backend and Next.js frontend. Both are fully Dockerized with separate containers. No Vercel. No Supabase. Deploy the whole thing on a $6 VPS, or split frontend and backend across different providers. You own the infrastructure. The problem I was solving: Every SaaS starter I evaluated had the same issue: they locked me into someone else's platform. Vercel for hosting.…

    Dec 2025 · github.com · its alternatives →

24. 24SW
    Stop wasting money on Saas services you don't use▲76

    2012 · saasly.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →