AI · alternatives · 2026

24 alternatives to Cal.ai Email Assistant

World's first open source AI scheduling assistant

Cal.ai is an open source AI scheduling assistant that automates meeting scheduling through email. It functions as a personal email assistant that handles calendar management and meeting coordination automatically. The… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Cal.ai Email Assistant launched in 2023; newer entries below may have overtaken it.

1. 1
   Cal.ai Phone Agent▲505

   Supercharged Cal.com scheduling with AI-powered calls

   2025 · coss.com · its alternatives →

2. 2
   CalBot▲115

   Carly lets you create custom AI agents with 120+ integrations. Give each agent an inbox, instructions, and tool access for email, CRM, scheduling, research, and operations.

   2025 · calbotservice.com · its alternatives →

3. 3
   Cal ID▲535

   Schedule and monetize meetings for free

   Nov 2025 · cal.id · its alternatives →

4. 4
   Cal.com Platform▲1,601

   Build your pixel-perfect booking experience with Atoms

   2024 · cal.com · its alternatives →

5. 5
   Cal.com Routing▲586

   Auto schedule appointments with leads using clever logic

   2025 · cal.com · its alternatives →

6. 6
   Cal Autobot▲1

   AI scheduling assistant in your inbox

   Oct 2025 · calautobot.com · its alternatives →

7. 7
   Meet-Ting▲271

   Free AI assistant for email scheduling in early access

   Jan 2026 · meet-ting.com · its alternatives →

8. 8
   Scheduled▲102

   Open source AI calendar scheduler that lives in Gmail

   Mar 2026 · tryscheduled.com · its alternatives →

9. 9
   April▲664

   Reach Inbox Zero by speaking with your email & calendar

   2025 · apps.apple.com · its alternatives →

10. 10
    Dule for Google Calendar▲123

    Email based AI scheduling assistant

    2025 · dule.ai · its alternatives →

11. 11
    Callum▲261

    AI calendar assistant for teams – supercharge your calendar

    Jan 2026 · getcallum.com · its alternatives →

12. 12
    Clara Labs▲285

    An intelligent scheduling assistant you can trust

    2016 · claralabs.com · its alternatives →

13. 13
    Ambient Daily Briefing▲308

    7am, AI-powered email that preps every meeting on your cal

    2025 · app.ambient.us · its alternatives →

14. 14
    Mayday▲188

    Your AI scheduling co-pilot

    2023 · mayday.am · its alternatives →

15. 15
    Calendly▲271

    Simple, beautiful scheduling

    2014 · calendly.com · its alternatives →

16. 16
    Parity▲103

    Your personal AI scheduling assistant

    2024 · its alternatives →

17. 17
    FranzAI ▲106

    The free AI email assistant

    2024 · gpt.franzai.com · its alternatives →

18. 18
    Calendar.AI▲171

    Discover everything about the people and companies you meet

    2020 · sync.ai · its alternatives →

19. 19
    Shortwave AI Assistant▲163

    Your AI-powered executive email assistant

    2023 · shortwave.com · its alternatives →

20. 20
    Shortwave AI Email Assistant 2.0▲214

    The ultimate search, analysis, and productivity companion

    2024 · shortwave.com · its alternatives →

21. 21
    Outboundly.ai▲190

    AI-powered cold outreach platform

    2023 · outboundly.ai · its alternatives →

22. 22
    Calk AI 1.0▲223

    Connect AI to your business data in seconds-from anywere

    Nov 2025 · calk-ai.com · its alternatives →

23. 23
    Tefez Scheduling▲111

    AI-Driven Scheduling, effortless, automated, yours

    2023 · calenyo.com · its alternatives →

24. 24
    Inbox AI▲201

    AI-Powered Personal Productivity

    2024 · 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 →