The best alternatives to Sagfi are AngelList, Remote, and Gloat.com (prev. Workey). If these 3 options don't work for you, we've listed a few more alternatives below.
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Intercom— Startups get 90% off Intercom, the complete AI first customer service platform
AngelList is building the infrastructure that powers the startup economy, providing startups and investors with the connected tools they need to launch and scale a startup or fund—and invest in both.