Top all-time · #841
Cal.com
Company blog · cal.com/blog · on HN as Peer_Richprogrammingbusiness
Cal.com is the company blog at cal.com, writing about programming and business. Since 2021, 80 different Hacker News readers have linked it 114 times, most often “Cal.com: The Open-Source Calendly Alternative”. No feed was found, so read it on the site itself.
Rarely recommended · 0 of 40 sampled comments recommend it?
Why HN links it
Mostly bare booking links in freelancer and hiring threads. Other comments mention Cal.com as an open-source Calendly alternative. None of the comments discuss its writing.
Summarised by Claude from a sample of 40 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
A fully customizable scheduling software for individuals, businesses taking calls and developers building scheduling platforms where users meet users.
Most-linked posts?
- Cal.com: The Open-Source Calendly Alternative7 people · 7 mentions · first linked 2021-09-17
- Cal.com – The open source Calendly alternative6 people · 6 mentions · first linked 2021-09-16
- Cal.com – Open Startup6 people · 6 mentions · first linked 2022-08-28
- Cal.com is going closed source3 people · 3 mentions · first linked 2026-04-15
- /blog/longevity3 people · 3 mentions · first linked 2023-01-24
- /about2 people · 2 mentions · first linked 2023-01-24
- Cal.ai: AI Scheduling Assistant2 people · 2 mentions · first linked 2023-07-21
- Cal.com is going closed source2 people · 2 mentions · first linked 2026-04-15
What Hacker News says?
you might like mcp.run, a tool management platform we're working on... totally agree running a process per tool, with all kinds of permissions is nonsensical - and the move to "remote MCP" is a good one! but, we're taking it a step (or two) further, enabling you to dynamically build up a MCP server from other servers managed in your account with us. try it out, or let me get you a demo! this goes for any casual comm…
Comment linking /team/dylibso/mcp.run-demo
on “Claude Integrations”Submitted Cal.com is going closed source as a story · 42 points
HN discussionThanks, this is very helpful. If it's unfeasible for a small indie app then that's a bug in the pricing. If you have time, I'd love to hear about your app and work out alternatives (not just for you, but for everyone) anselm@gcmp.io anselm_io on Twitter Or book a chat directly: https://cal.com/anselm-io/talk-about-jazz (everyone else who has opinions on pricing is welcome to do the same)
Comment linking /anselm-io/talk-about-jazz
on “Jazz – Apps with Distributed State”Submitted Cal.com: The Open-Source Calendly Alternative as a story · 4 points
HN discussionWhich programming subject do you want in particular? If it's coding syntax heavy, then the blackboard format might not be suitable. But if it's algorithm-heavy, then blackboard visuals could be very helpful. Feel free to email me eltonlin@alum.mit.edu or if you prefer calling https://cal.com/eltonlin1998/15min (BTW the things I described like overcrowded Office Hours etc., restricted access to past problems, were al…
Comment linking /eltonlin1998/15min
on “Show HN: I made a cheap alternative to college-level math & physics tutoring”Submitted Cal.com v2. Formerly Calendso. COSS Scheduling Infrastructure as a story · 4 points
HN discussionThe same job title could have very different responsibilities. I have been more of a "full-stack" MLE, I work from research and prototyping all the way to production software engineering and ML infra/dev-ops. I have also been mentoring MLEs and ML tech leads/managers - schedule a free 30-min intro call at: https://cal.com/studioxolo/intro .
Comment linking /studioxolo/intro
on “Ask HN: Machine learning engineers, what do you do at work?”Submitted Cal.com is going closed source as a story · 3 points
HN discussionWow, that’s a nice thought – I’d give it a try, sure! Wanna chat about it for a bit? hn@ale.sh or https://cal.com/notpushkin/45m
Comment linking /notpushkin/45m
on “BuyMeACoffee silently dropped support for many countries (2024)”Submitted How Cal.com shipped an iOS/Android App in 3 weeks as a story · 3 points
HN discussionLocation: London, UK Remote: Yes Willing to relocate: Yes Technologies: AI/LLMs, workflow automation Linkedin: https://www.linkedin.com/in/jimleuk/ Email: hello@jimle.uk I'll teach your leadership, product or dev teams to build using AI/LLMs. I do blogs, talks, demos and flexible workshops focused on building AI-powered features and workflows - using no/low-code tools (no IDE required!) and the latest AI services, t…
Comment linking /jimleuk/30min
on “Ask HN: Who wants to be hired? (June 2024)”Submitted Open source: what do we think? as a story · 3 points
HN discussionIn addition to taking care of myself and my family, I'm working on: - Polishing my personal website[1], and going back to blogging. - Figuring out trading signals[2] and algorithms, testing via paper trading. - An API[3] to verify YC company and founders. - Monitoring my investment portfolio, re-balance once or twice a year. - Mentoring AI/ML engineers and leaders. Free 30-min intro call[4]. - Various indie projects…
Comment linking /studioxolo/intro
on “Ask HN: What would you spend your time working on if you didn't need money?”Submitted Sold Out: Why Cal.com Replaced Traditional Sales with Growth Specialists as a story · 3 points
HN discussionHey team, I'll be available for contract/freelance work in the coming months. I've led, built and managed b2b/b2c digital products and teams for the past 7yrs at a creative agency based in Shoreditch, London. Happy to offer special discounts for AI/LLM startups or encumberments wanting to play catchup! Let's chat - https://cal.com/jimleuk . -- Location: London, UK Remote: yes Willing to relocate: depends - SEA regio…
Comment linking /jimleuk
on “Ask HN: Who wants to be hired? (March 2024)”Submitted Cal.com – Open Startup as a story · 3 points
HN discussionLocation: Hampshire, UK - ~90 mins from London Remote: Remote-only preferred Willing to relocate: For the right role Technologies: Typescript, Next.js, tRPC, Postgres, Terraform, AWS, Python, React, etc Résumé/CV: https://www.linkedin.com/in/georgegebbett Email: hackerhiring@ghg.pw Put time in my calendar: https://cal.com/georgegebbett/15min I'm a backend-leaning FS eng - very much see my role in an org as an solver…
Comment linking /georgegebbett/15min
on “Ask HN: Who wants to be hired? (May 2024)”Submitted Cal.com: Open Scheduling Infrastructure as a story · 3 points
HN discussionDepends on the contract value, let's have a chat https://cal.com/vishnukool/30min
Comment linking /vishnukool/30min
on “Launch HN: Agent37 (YC F26) – Low-cost agent sandboxes for running agents”Submitted Scheduling is NP-Hard. We need responses in milliseconds as a story · 2 points
HN discussionI've mentored senior software developers transitioning to ML - everyone comes from slightly different background and experience. Feel free to schedule an intro call to discuss your specific situation https://cal.com/studioxolo/intro .
Comment linking /studioxolo/intro
on “Ask HN: Has anyone successfully pivoted from web dev to AI/ML development?”Submitted Cal.com OSS project goes closed source due to AI as a story · 2 points
HN discussion> I understand that you are very early in boot-strapping, but what I was missing while skimming over the videos and links and webpage is a better high-bird view or contextualization of the apporach. For a higher level view and contextualization, can you share more on what you mean? This would help give us a better idea on what to build. > I was considering a demo, but the two options (chat and quick chat) were a bit…
Comment linking /team/subimage
on “Launch HN: SubImage (YC W25) – See your infra from an attacker's perspective”Submitted Engineering in 2026 and Beyond as a story · 2 points
HN discussionSEEKING WORK | Italy (GMT+1) | Remote Full-stack developer and web performance consultant with 9 years of experience. Available part-time or full-time, solo or as part of a small team. I can work with TypeScript, Clojure and Zig. GCP certified (Associate Cloud Engineer, Professional Data Engineer). Email: giacomo@giacomodebidda.com LinkedIn: https://www.linkedin.com/in/giacomodebidda/ Site/Blog: https://www.giacomod…
Comment linking /giacomodebidda/30min
on “Ask HN: Freelancer? Seeking freelancer? (May 2024)”Submitted Google’s new spam policy may be affecting your invitations as a story · 2 points
HN discussionGitLab is definitely the most obvious success at $600M+ in revenue, but a couple new ones are Cal.com and PostHog. Cal.com is open-source Calendly, has raised $32M, and shares their stats publicly: https://cal.com/open PostHog is open-source Mixpanel/Amplitude, has raised $39M, and appears to be widely recommended these days.
Comment linking /open
on “Ask HN: what are examples of successful "open-source alternatives"?”Submitted Cal.com cut cold load times by breaking down tRPC routers as a story · 2 points
HN discussionReally cool project! I like this new trend of building SaaS products as open source, and still delivering a hosted free tier. https://cal.com/ is another example of this. And super proud that both are using Prisma!
Comment linking /
on “Typebot: A conversational form builder that you can self-host”Submitted Cal.com: Moving to closed-source: the technical changes as a story · 1 points
HN discussion
