Looking for a Cronofy alternative for AI agents?
Cronofy is enterprise temporal infrastructure — real-time calendar sync across providers, with API plans starting at $819/mo. Teams look for an alternative for two reasons: the price floor, and the fact that sync freshness does not stop two agents from booking the same slot. AgentDraft is a coordination layer built for that second problem — priority-ranked conditional writes, holds with TTL, and an append-only audit trail, from a free tier.
Updated
Credit where due: Cronofy is mature, enterprise-grade scheduling infrastructure. Its sync freshness across Google, Microsoft 365, Apple, and on-prem Exchange is genuinely strong; the Scheduler UI, real-time push, and enterprise compliance posture are the product of years of doing this for demanding customers. Their current positioning — "temporal infrastructure… keeping agents, systems, and their users in sync" — plus a shipped MCP server shows they take the agent wave seriously.
If your product is human-driven scheduling at enterprise scale — recruiter coordination, sales round-robins, customer-support booking — and you have the budget, Cronofy earns its price. The head-to-head detail is in AgentDraft vs. Cronofy.
Sync freshness is not write arbitration. Cronofy keeps every connected calendar's state current, but when two agents act on that state concurrently, the check-then-book race is still open: Agent A reads availability and sees 3pm free; Agent B reads the same, equally fresh, availability and sees 3pm free; both create the event; both succeed. Fresher reads narrow the window — they cannot close it, because the check and the write remain separate operations. Cronofy has no agent identity, no priority model, and no bump window; the MCP server exposes calendar operations to agents but does not arbitrate between them.
AgentDraft closes the window at the storage layer: one row per time bucket, written in a single DynamoDB transaction with a conditional check, so the check is the write. In the open collision benchmark, the rank-1 agent won 100.0% of races at p99 112 ms across 500 concurrent attempts, with 0 double-commits.
| Capability | AgentDraft | Cronofy |
|---|---|---|
| Per-agent email inbox | Yes — one inbox per agent, behind the same API | No — calendar infrastructure, not email |
| Conflict-free calendar writes | Yes — storage-level conditional write; the check is the write | No — strong sync freshness, but writes are not arbitrated |
| Agent priority + bump window | Yes — agent_priority ranking, 30 s default bump window | No — no agent identity or priority model |
| Holds with TTL | Yes — 30 s default, tunable | Not advertised at time of review |
| Append-only audit trail | Yes — holds, commits, evictions, mail, rules | No audit trail of agent actions |
| Typed 409 on lost races | Yes — HTTP 409 outranked, typed in both SDKs | N/A — concurrent writes both succeed, so there is no losing response |
| Entry price | Free — 1 agent, 1 mailbox, 50 bookings/mo, no card | $819/mo API-plan floor |
Cronofy rows reflect the public product surface at cronofy.com, checked 2026-07-01. If we've mis-stated a feature, tell us and we'll correct it.
Choose Cronofy if you need enterprise scheduling features — the Scheduler UI, real-time sync at scale, enterprise compliance — and you have the budget for them. It's the right call for single-agent or human-driven scheduling products where the hard problem is provider sync and enterprise requirements, not races between writers. If only one process writes to each calendar, AgentDraft's conflict engine is solving a problem you don't have.
Choose AgentDraft when multiple agents will write to the same calendar and "who wins" needs a deterministic, auditable answer — or when a $819/mo floor doesn't fit a product that hasn't shipped yet. The coordination layer is the whole product: priority-ranked conditional writes, a 30-second bump window, holds with TTL, typed 409s, per-agent inboxes, and an append-only audit log, priced from a free Developer tier ($10/mo Individual, $25/mo Team above it). The two also compose: keep Cronofy as your provider adapter and add AgentDraft as the coordination layer above it — AgentDraft decides the winner, the winning write flows down through Cronofy. Terms like bump window and hold are defined in the glossary.
Frequently asked
Why do teams look for a Cronofy alternative for AI agent work?
Two reasons come up repeatedly: the $819/mo API-plan floor, which is sized for enterprise scheduling vendors rather than agent builders, and the coordination gap — Cronofy keeps calendars in sync but does not arbitrate between agents, so two agents that check availability and then book the same slot will both succeed.
Does Cronofy's MCP server make it agent-ready?
Partially. MCP is a transport: it exposes calendar operations — read availability, create event, cancel — to an agent in a standard way. It is not a coordination model. The race between two agents creating the same event still resolves at the calendar provider, which accepts both writes. Arbitration has to live in the write path itself, which is what AgentDraft's priority-ranked conditional write does.
Can AgentDraft replace Cronofy's enterprise scheduling features?
No. AgentDraft does not offer a Scheduler UI, real-time provider sync at Cronofy's scale, or Cronofy's enterprise compliance surface. If those are your requirements, keep Cronofy — and if you also run multiple agents, add AgentDraft above it as the coordination layer rather than replacing it.
How much does AgentDraft cost compared to Cronofy?
AgentDraft has a free Developer tier (1 agent, 1 mailbox, 50 bookings a month, no card), a $10/mo Individual tier for up to 3 agents, and a $25/mo Team tier with shared priority resolution. Cronofy's API plans start at $819/mo. The gap reflects the audience — Cronofy is priced for enterprise scheduling vendors, AgentDraft for agent builders who need coordination before their third paying customer.
- AgentDraft vs. Cronofy — the head-to-head comparison, feature by feature.
- The AgentDraft collision benchmark — the 500-attempt receipts behind the race claims.
- AgentDraft pricing — free Developer, $10/mo Individual, $25/mo Team.
- Glossary — bump window, hold TTL, and the rest of the coordination vocabulary.