Sym alternatives

The open source Calendly alternative. Self host it, or have it hosted. Integrate it seamlessly into your business with advanced customization and an open API.

Knock is a flexible API and dashboard for powering delightful product notification experiences. It helps you ship faster, iterate on your product messaging, and scale your notifications for the long-term. We built product notifications so you don’t have to.

Stytch is a full stack authentication and authorization platform, whose APIs make it simple to seamlessly onboard, authenticate and engage users. Improve security and user experience by going passwordless.

Opta is a new kind of Infrastructure-As-Code framework designed for fast moving startups. It enables you to work with high-level constructs like microservices, environments, databases; instead of low level configuration like VPC, IAM, ELB or Kubernetes!

Get the right cloud infrastructure auto-provisioned from your code. Write your app once with Node.js, Python and more, then push to deploy to AWS, Azure or Google Cloud. No config or infrastructure YAML files, no tedious deployment tasks. Just focus on coding.