Indie hackers need a scheduling tool that is cheap, flexible, and easy to embed. Cal.com is an open‑source alternative to big SaaS calendars, and it now offers three tiers that suit solo founders, small teams, and growing startups. This guide reviews each tier, compares them to Calendly and Acuity Scheduling, and gives three concrete recommendations you can act on today.
Cal.com started as a community‑driven project in 2020. By 2026 it runs on a modern stack (React, Node, Prisma) and offers a hosted cloud version plus a self‑hosted Docker image. The platform lets you create booking pages, collect payments, and sync with Google, Outlook, and iCloud calendars. Because the code is open source, you can add custom fields or hook into any webhook service without paying extra.
The free tier is truly free. Pro costs $12 per user per month, billed annually for a 20 % discount. Enterprise pricing starts at $250 per month for up to 10 users and scales with volume. All plans include a 14‑day free trial of the Pro features, so you can test before you buy.
Calendly is the market leader. Premium costs $15 per user per month and adds round‑robin routing, advanced reporting, and a Zapier‑free workflow builder. It does not offer a self‑hosted option.
Acuity’s lowest paid plan is $15 per month per user. It includes client intake forms, multiple time‑zone support, and a built‑in CRM. The UI feels dated, and there is no open‑source community.
Setmore offers a free plan with unlimited bookings but limits integrations to Facebook and Instagram. Payments require a Stripe add‑on that costs $12 per month.
| Product | Free Tier? | Price (per user) | White‑label | Payments | Best‑for | Downside |
|---|---|---|---|---|---|---|
| Cal.com Free | Yes | $0 | Partial (logo stays) | Stripe, PayPal | Solo indie hacker | Limited to 3 users, community support only |
| Cal.com Pro | No | $12 | Full | Stripe, PayPal, Subscriptions | Small teams, global payments | Self‑hosted requires dev ops |
| Calendly Premium | No | $15 | Partial (branding can be hidden) | Stripe, PayPal | Teams that need advanced routing | No open‑source, higher price |
| Acuity Scheduling | No | $15 | Partial (custom CSS) | Stripe, Square | Businesses that need intake forms | Dated UI, no free tier |
| Setmore Free | Yes | $0 (add‑on $12) | No | Stripe (add‑on) | Very small operations | Limited integrations, add‑on cost |
Follow these three steps to pick a plan that matches your revenue and workflow.
Most indie hackers find the Cal.com Pro plan the sweet spot. It removes branding, gives you a custom URL, and lets you charge in any of the 135 supported currencies. The extra $3 per month compared to Calendly translates into lower transaction fees on Stripe because you can pass the exact amount to the customer.
The free tier gives unlimited events, basic branding removal, and up to 3 users. It is enough for a solo founder who needs simple booking without advanced analytics.
Cal.com Pro costs $12 per month per user and includes custom domains, Zapier integration, and team routing. Calendly Premium is $15 per month per user and adds advanced reporting and round‑robin routing. Cal.com wins on price and open‑source flexibility.
Yes. Both the free and Pro plans support Stripe payments. The Pro plan adds subscription billing and advanced tax settings.
Acuity’s UI feels dated, and the lowest paid tier starts at $15 per month per user. It also lacks the open‑source community that Cal.com offers for custom plugins.
Cal.com Pro supports over 135 currencies via Stripe. Calendly supports the same but requires a Premium plan. For indie hackers targeting global markets, Cal.com Pro is the most cost‑effective.
Choosing the right scheduler can shave hours off your admin work and increase conversion on paid appointments. Cal.com gives indie hackers the power of an open‑source platform without the typical developer overhead. Try the free tier today, and upgrade to Pro when your revenue justifies the extra features.