Cheapest platform as connected accounts grow
Bookings held at your current input β only connected-account count changes per row. Cal.com doesn't meter accounts at all, so watch how Nylas's linear per-account cost eventually crosses Cronofy's flat tiered fee.
| Connected accounts | Nylas | Cronofy | Cal.com | Cheapest |
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Why per-account, tiered-plus-overage and per-booking billing shapes matter
Calendar and scheduling APIs don't compete on a single sticker price β each vendor meters a different dimension of your app. Nylas bills base plan + max(0, connected accounts β included accounts) Γ per-account rate, with its Calendar-only plan starting at $10/month for 5 included accounts and $1.50 for each account beyond that β cheap at small scale, but the cost climbs linearly as every new user who connects their calendar adds a line item. Cronofy flips that: its Emerging API tier is a flat $819/month (annual billing) that already includes up to 1,000 synced accounts and unlimited API calls, with overage kicking in only at $0.69 per account past that ceiling (its Growth tier raises the ceiling to 6,000 accounts at $2,399/month with a lower $0.35 overage) β expensive for a handful of users, but far cheaper than Nylas once you're syncing hundreds of accounts. Cal.com Platform ignores connected-account count entirely and instead bills base plan + max(0, bookings β included bookings) Γ per-booking rate β its Starter tier is $299/month for 25 bookings, then $0.99 per extra booking β so it's the right fit when your cost driver is scheduling activity, not the number of calendars you've linked.
The practical question isn't "which vendor is cheapest" but "which unit does my product actually scale on." An app that lets thousands of end-users connect their own calendar (an HR tool, a CRM integration) will blow past Nylas's linear per-account fee fast and should watch the Nylas-vs-Cronofy crossover, which sits around 540-550 connected accounts with the numbers above. An app built around a small number of shared calendars taking heavy booking volume (a clinic, a single-company booking page) should compare against Cal.com's per-booking meter instead, since accounts barely move its bill at all. Run your own connected-account and booking numbers above rather than trusting a vendor's homepage price.
How this calculator works
The Nylas vs Cronofy vs Cal.com Cost Calculator compares three calendar/scheduling API pricing shapes β Nylas (base plan + per-connected-account overage), Cronofy (flat tiered plan + per-account overage) and Cal.com Platform (tiered plan + per-booking overage) β at your monthly connected-account and booking volume. Nylas's cost is base plan + max(0, connected accounts β included accounts) Γ per-account rate; Cronofy is base plan + max(0, connected accounts β included accounts) Γ overage rate with a much higher included allotment; and Cal.com is base plan + max(0, bookings β included bookings) Γ per-booking rate, ignoring connected-account count entirely. The calculator shows all three totals side by side, then a separate table isolates all three vendors across a range of connected-account counts at your current booking volume, so you can see exactly where Nylas's linear per-account cost overtakes Cronofy's flat tiered fee.
These are representative pricing shapes based on published 2026 rates (Nylas Calendar plan: $10/mo base, 5 accounts included, $1.50/additional account; Cronofy Emerging API tier: $819/mo annual, up to 1,000 synced accounts included, $0.69/account overage, with a Growth tier at $2,399/mo for up to 6,000 accounts and $0.35/account overage; Cal.com Platform Starter: $299/mo, 25 bookings included, $0.99/additional booking), not live vendor quotes β actual pricing varies by contract term, plan tier and negotiated enterprise terms, and all three vendors offer custom pricing above their published self-serve tiers. Always confirm current pricing directly with the vendor before budgeting.
Frequently asked questions
Is Nylas cheaper than Cronofy for a calendar API?
Usually yes below a few hundred connected accounts, because Nylas has a low $10/month base (Calendar plan) plus $1.50 per connected account beyond the first 5, while Cronofy's Emerging API tier starts at a flat $819/month regardless of volume. The crossover sits around 540-550 connected accounts, where Nylas's linear per-account cost catches up to Cronofy's flat fee β past that point Cronofy is usually cheaper until you approach its 1,000-account ceiling, after which its overage rate ($0.69/account) or the higher Growth tier applies. These are representative published rates, not live quotes β confirm current pricing with each vendor before budgeting.
Why does Cronofy charge a high flat monthly fee instead of billing per connected account like Nylas?
Cronofy targets mid-market and enterprise calendar-sync use cases (scheduling tools, HR platforms, recruiting software) and bundles unlimited API calls, two-way sync across Google/Microsoft/Apple/Exchange, and up to 1,000 synced accounts into its Emerging plan ($819/month annual). That flat structure is expensive for a small app with a handful of users, but it becomes cost-effective once you're syncing hundreds of accounts, because Nylas's linear per-account fee keeps climbing while Cronofy's included allotment absorbs the growth for free until you hit the ceiling.
How does Cal.com Platform's per-booking pricing compare to per-connected-account billing?
Cal.com Platform meters a completely different unit: confirmed bookings, not connected calendar accounts. Its Starter tier is $299/month including 25 bookings, then $0.99 per additional booking β so it scales with how much scheduling activity actually happens, not how many end-user calendars you've connected. That makes Cal.com the better fit when you have few connected calendars but high booking volume (e.g. a single company calendar taking thousands of customer bookings), while Nylas and Cronofy fit better when you have many end-users each syncing their own calendar with comparatively few events.
Which calendar or scheduling API is cheapest β Nylas, Cronofy or Cal.com?
There's no single winner because each vendor meters a different dimension. Nylas wins for small-to-mid connected-account counts (roughly under 500-550) thanks to its low base fee. Cronofy wins once you're syncing several hundred to a few thousand accounts, since its flat tiered plan absorbs growth that would otherwise scale linearly on Nylas. Cal.com wins when your cost driver is booking volume rather than connected-account count. Run your own connected-account and booking numbers through the calculator above instead of assuming a vendor's headline price applies to you.
What's the difference between billing by connected accounts and billing by bookings?
A connected account is an end-user's mailbox or calendar (Google, Microsoft, Apple, Exchange) that your app has linked via OAuth β Nylas and Cronofy both meter this, since every linked account adds ongoing sync and API load whether or not it generates activity. A booking is a single scheduled event created through the API β Cal.com Platform meters this instead, so an app with thousands of connected accounts that rarely book anything costs little, while an app with few connected accounts but constant booking activity costs more. Picking the right vendor means knowing which of the two grows faster in your product.