Zapier vs Windmill (OSS source build)

Fit:

Migration notes

Developer-oriented scripts, schedules and flow orchestration; translate integrations and code rather than import Zaps/scenarios. Build OSS source if unrestricted AGPL hosting needed; common enterprise/event features paid.

Sources: www.windmill.dev, zapier.com · checked 2026-10-21

ZapierPaid incumbent

Entry priceUSD 19.99 / account / month

Pricing modelusage, billed annual

OwnerZapier, Inc.

Professional advertised from USD19.99/month; yearly toggle, usage tiers apply. Free plan is 100 tasks and two-step Zaps. Source

Zapier plans reviewed
Professional	entry	USD 29.99 / account / mo
Team	business	USD 103.50 / team account, up to 25 users / mo
Enterprise	enterprise	Quote only

Windmill (OSS source build)Open-source alternative

Fit for Zapier

License

GNU Affero General Public License v3.0 Permissions of this strongest copyleft license are conditioned on making available complete source code of licensed works and modifications, which include larger works using a licensed work, under the same license. Copyright and license notices must be preserved. Contributors provide an express grant of patent rights. When a modified version is used to provide a service over a network, the complete source code of the modified version must be made available. May Commercial useModificationDistributionPatent usePrivate use Must License and copyright noticeState changesDisclose sourceNetwork use is distributionSame license No LiabilityWarranty Summary from GitHub's choosealicense.com

Paid-feature tier C

Self-host

Paid-feature limits3 noted

Windmill (OSS source build) plans reviewed
Free and Open-source	free self-hosted core	Free
Enterprise Edition	commercial edition	Not established
Enterprise	configured commercial cloud or self-host license	Quote only

What you may give up

Kafka/NATS/SQS/cloud-event triggers and SQL Server/Oracle runtimes paid.
Content search, workspace error handlers, some Git/deployment features and enterprise governance paid.
Published free edition has workspace/user/group quotas; vendor Community Docker/release binaries include proprietary code with resale, hosting and modification restrictions.

Tier C: Non-enterprise source build is AGPLv3 with Apache client/spec components; proprietary snippets excluded. Commercial hosting of AGPL build is possible subject to AGPL. Vendor Community binaries are separately restricted, not the OSS artifact identified here. Workflow features are paid, so C. License source

What running it takes

Windmill server and workers

Hover or focus an icon for its name. Dashed means not established; struck through means no; grouped icons are alternatives.

PostgreSQL is platform state/queue, distinct from databases queried by user jobs. Current Compose example uses Postgres18. No claim that every advertised runtime is in every edition. Infrastructure and staff time are not priced here; this page does not compare total cost.