Dev tools · alternatives · 2026

24 alternatives to Space911

Activities planning software & APIs for developers & brands

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Space911 launched in 2021; newer entries below may have overtaken it.

1. 1
   DEV APIs▲320

   Powerful APIs to help grow your business

   2021 · nocodeapi.com · its alternatives →

2. 2
   Uber API▲311

   Move your app forward with the Uber API

   2014 · developer.uber.com · its alternatives →

3. 3
   Plan 1.0▲314

   Manage & organise your life

   2016 · getplan.co · its alternatives →

4. 4
   Brand API▲252

   The ultimate API to retrieve any company's brand assets

   2022 · brandfetch.com · its alternatives →

5. 5
   Personalization API▲364

   Instantly pull company branding data to use in your projects

   2019 · brandfetch.com · its alternatives →

6. 6
   companies.tools▲263

   See which apps are used by your favourite product's teams

   2022 · efficient.app · its alternatives →

7. 7
   Recal.dev▲365

   Resend, but for Calendar & Scheduling. API. SDK. MCP.

   2025 · recal.dev · its alternatives →

8. 8AM
   API Marketplace for Developers by Developers▲54

   2016 · askmacgyver.com · its alternatives →

9. 9
   Developerhub.io▲149

   Create beautiful powerful documentation, hassle-free.

   2018 · developerhub.io · its alternatives →

10. 10
    Developer Experience Portal▲98

    Generate SDKS and documentation in one click

    2018 · apimatic.io · its alternatives →

11. 11
    OpenAI Responses API and Agents SDK▲190

    New tools for building agents and tools

    2025 · openai.com · its alternatives →

12. 12
    API-first referral marketing SDK for web developers▲49

    A collaborative AI workspace, built on your company context. Build and orchestrate agents right alongside your team

    2020 · notion.so · its alternatives →

13. 13MW
    My weekend project using the Soundcloud API▲178

    2012 · getworkdonemusic.com · its alternatives →

14. 14
    Planspace▲64

    Map based calendar for travel, mobile work and busy lives

    2019 · its alternatives →

15. 15
    Merge▲155

    One API for project management and ticketing integrations

    2022 · merge.dev · its alternatives →

16. 16
    Tasker Builder▲200

    Build your idea from prompt to product to pipeline

    2025 · tasker.ai · its alternatives →

17. 17
    Apimint▲170

    Design and Mock API + code SDK + Auto Documentation

    2016 · apimint.com · its alternatives →

18. 18
    APItools▲98

    API Zen for App Developers

    2014 · apitools.com · its alternatives →

19. 19
    Visual Swagger Editor for Teams▲89

    Link your app design to API calls

    2022 · its alternatives →

20. 20
    Conektto API-First Design Studio▲157

    API design studio for product managers

    2023 · conektto.io · its alternatives →

21. 21
    Schemer▲83

    Manage your life with fast, integrated tools & analytics.

    2020 · schemer.app · its alternatives →

22. 22
    DevClad▲110

    Meet other developers 1:1 - team up on projects + hackathons

    2023 · its alternatives →

23. 23
    Plans▲101

    The ultimate social event planner app for real-life meetups!

    2021 · its alternatives →

24. 24
    Tika▲117

    Unified calendar, meeting notes editor and task manager

    2019 · 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 →