The only competitor we can think of right now is https://startuptracker.io/ they combine information from leading providers with data crowdsourced directly from startups to make your startup research easier than ever. Data sources include: Fedger.io, Beta List, Crowdsourcing, Crunchbase, Product Hunt, Social Media. Source: almost 3 years ago

Https://stonksfolio.com and https://www.portfolio-performance.info look promising. Source: 9 months ago

Https://stonksfolio.com terrible name, but I'll check it out anyway. Source: 9 months ago

I've been using https://stonksfolio.com/ for quite some time now, it's exactly what you are looking for. They have a trial as well so you can check if that's the right tool for you, but for me it was simple and exactly what I needed. Source: about 1 year ago

If you want something more comprehensive, try this: https://stonksfolio.com/. Source: almost 2 years ago

Https://stonksfolio.com I started it to track my all my investment accounts in one place and a couple of years ago decided to open it up to the public. Active users are in the hundreds but not growing rapidly. Tried to monetize it with Patreon but only 2 people actually subscribed. It's a fun project to work on, though, and not having paying customers allows me to ignore it until I get the enthusiasm to work on it... - Source: Hacker News / over 2 years ago