Visual workflow builder
Drag-and-drop nodes for triggers, conditions, integrations, and human-in-the-loop approvals.
Series B · $40M raised
Halcyon turns the workflow you sketched on a whiteboard into production code, monitoring, and audit logs — in an afternoon, not a quarter.
320+
Teams using Halcyon
99.99%
Platform uptime
12k+
Workflows running daily
SOC 2
Type II certified
About Halcyon
We're a remote team of 28, founded by two ex-Stripe engineers in 2022. We were tired of watching every ops team rebuild the same workflow engine. So we built it once, made it good, and made it easy to point at any system you already use.
Headquartered
Remote-first · SF HQ
Backed by
Sequoia, Y Combinator
From our docs
workflow "refund-approval" { trigger stripe.dispute.created if amount > 200 { notify #finance wait_for approval } execute stripe.refund(amount) log audit_trail }
The platform
Drag-and-drop nodes for triggers, conditions, integrations, and human-in-the-loop approvals.
Stripe, Salesforce, Snowflake, Slack, AWS, GCP, Datadog, Linear — pre-built and tested.
Every action logged, every decision attributed. Built for SOX, SOC 2, HIPAA, GDPR.
Start with the visual builder. Bring in our solutions team when you need a custom integration.
Every workflow run is observable: latency, success rate, cost. Alert on what matters.
Okta, Azure AD, fine-grained roles. Encryption at rest and in transit. Region locking on request.
Customers
“Cut our SOC 2 audit prep from 3 months to 2 weeks. Halcyon's audit log is the only one our auditor didn't ask follow-up questions about.”
Priya Shah
Head of Compliance, NorthLane
“Replaced 14 brittle Zapier zaps and two Lambdas with one Halcyon workflow. Our on-call rotation thanks me weekly.”
Marcus Chen
Director of Ops, Marin
Get in touch
Pick a workflow you wish you could stop maintaining. We'll show you it running in Halcyon by the end of the call.
Book a demo →HQ
548 Market St, Suite 1100
San Francisco, CA 94104