The best alternatives to Condense9 are Up, Serverless, and Serverless-Dev-Tools. If these 3 options don't work for you, we've listed a few more alternatives below.
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Snowflake - BUILD— The Free Dev Conference for AI & Apps on Nov. 12-14
Up deploys infinitely scalable serverless apps, APIs, and static websites in seconds, so you can get back to working on what makes your product unique.
sls-dev-tools improves the Developer-Experience (DX) of building state-of-the-art Serverless applications. This open-source tool enables you to make intelligent decisions while developing and debugging, directly in your terminal.