nowfound

Alternatives

Products that do what Limitly does

Authentication for your API

  1. 1

    Any website. We deliver the API.

    Mar 2026 · anything.notte.cc

  2. 2
    Pizzly323

    Building API integrations has never been easier

    2020

  3. 3

    Auth for any app. Get every feature. Deploy everywhere.

    2018

  4. 4
    KeyRunner104

    The zero trust API client

    2024

  5. 5

    The easiest 3rd-party sign-in for your apps and APIs

    2020

  6. 6
    Warrant134

    APIs for authorization and access control

    2021

  7. 7
    Mighty195

    OAuth for agents

    2025

  8. 8

    Frictionless security: auth & user management with passkeys

    2023

  9. 9

    Privacy-first experiments & feature flags in any language

    2020

  10. 10

    Flexible auth for B2B products

    2023

  11. 11
    Authentiq157

    Strong authentication, without the passwords

    2017

  12. 12
    Rately175

    Take control of your API traffic with custom rate limits.

    Oct 2025

  13. 13
    Astra AI142

    Universal API for adding any app to your LLM

    2024

  14. 14

    One identity layer for your customers, APIs, and agents

    Jul 2026 · monocloud.com

  15. 15
    Passkeyd160

    Passkey auth, minimalistic and self hosted

    2024

  16. 16

    Startup data via API

    Mar 2026 · tryfundable.ai

  17. 17

    Protect your LLM applications with a few lines of code.

    2023

  18. 18
    Danger129

    Protect your app from bad humans

    2024

  19. 19

    The new standard for connecting APIs and integrations

    2021

  20. 20

    Is your WordPress REST-API secure?

    2025

  21. 21OA

    Hey HN, we’ve been working on a way to simplify authentication with third-party APIs. This started because my co-founder andreterron (https://news.ycombinator.com/user?id=andreterron) and I both built personal dashboards to track different health and productivity metrics, but it’s such an annoying chore to integrate with new APIs. First you read their docs to learn their authentication method, then build and deploy a custom server to receive OAuth callback requests or deal with CORS, register an app with them, then finally you can send the first request to their API. After the…

    2023 · oneapikey.com

  22. 22

    Encryption As A Service because privacy matters for everyone

    2020

  23. 23SB

    Hello HN, I’ve always loved building frontend-only apps—those you can prototype over a weekend, host for free on GitHub Pages, and scale to millions of users. Unfortunately, AI-enabled apps complicate things, as exposing your OpenAI key to the world is obviously a no-go. This also means mobile developers often have to run their own servers. That’s why I built ServerlessAI, an API gateway that lets you securely call multiple AI providers directly from client side using OpenAI-compatible APIs. You can authenticate users through any identity provider, like Google or Apple, and set per-user…

    2024 · serverlessai.dev

  24. 24
    authzed83

    The platform to store, compute, and validate app permissions

    2021

Ranked by how close each launch is in meaning, then by votes. Refine with a description →