What are some of the best conferences that startups should attend?

Like the other commenters mentioned, it depends on your industry. Here are my addition to the ones others have listed:

SaaStr

Developer Week

SXSW (YMMV)

Hey there! Here are a few of the best conferences for startups to attend: TechCrunch Disrupt Web Summit Slush

We are attending Web Summit in Lisbon in November!

If you have a marketing team, then send it to the industry in sales or arbitrage.

We are planning to attend HUSTEF conference in Budapest, Hungary. It is one of the largest conferences in Europe, as per my knowledge, related to software testing and quality.

For Web3 we visited ETHDenver and DevCon 6 Bogota and they were amazing. There we also European ones such as ETHCC, ETHBelgrade, Blocksplit etc..

TechCrunch Disrupt.

I'm going to Denver Startup Week this week, and so far I've been really impressed. It's a massive free week-long conference that I definitely will be going back to.

Depends on your industry! When I was working in Fintech, it was Money 2020 - now that I'm in developer tools - Github Universe and AWS Reinvent for engagement and sales. Also if you guys love an underdog story, please support Graphite today - we spent most of the day in #3 and are currently on track to overtake #1 :)

There are many great conferences for startups, and the best ones can depend on your industry and goals. Some popular ones include TechCrunch Disrupt, Web Summit, Collision, SXSW, and Y Combinator's Demo Day. Researching events related SocioYelp to your specific niche or market can also help you find valuable conferences to attend.