Google Analytics gives us good baseline stats.
Initially, we used Mixpanel incorrectly, by simply tracking user behavior on our site, rather than building out marketing funnels. We dropped it for a while, but now we’re giving it another go. We also are looking at Intercom and Kissmetrics. Mixpanel is a little expensive and a little frustrating how it's set up, but it's good for just tracking stats quickly.
I use Google Docs for pretty much everything I do in sales--usually just building target lists and spreadsheets. I gave up on Highrise, and Salesforce scares me. I would have no idea what to do with that thing.
We did a search of a few different platforms, and we chose Zendesk because 1) my teammates liked their friendly/accessible/informal brand; 2) they had a free 30-day trial that allowed us to try out a bunch of features; and 3) their customer service during that 30-day period was great. There were a lot of things about the interface that were confusing at first, and they helped us through that. It's also pretty affordable ($6/month). We needed a shared support inbox, and that’s one of Zendesk’s primary features. It was obvious that we needed a customer support tool because we started having trouble managing all the requests coming in, and we needed to create a formalized process for dealing those requests and allowing our users to ask questions.
MailChimp is good, though it's starting to get pricy because we now have a mailing list of over 30,000 people. We're starting to get to a point where I would consider other services because of the price (probably Mandrill or Sailthru).
We’ve been using Dropbox less and less because Google Drive is so easy and built right into our platform.
Google Drive is the easiest because it's built right into our platform, but it crashes more than Dropbox, and it's hard to force it to sync.
Our lawyers needed Box for putting together data rooms because it has some enhanced features like notifications, comments and security. We really only use it for that purpose, though.
I found them by asking my network. They have great health insurance at below-market prices. Side note, their SaaS product, has a bad, really outdated interface, but the service works. As a startup, it's really hard to compete for candidates against better-funded startups and the big boys (Google, etc), so we wanted to be able to offer an attractive benefits package. TriNet helps us do that with their great insurance offerings, and we wanted to be able to offer some 401K options as well.
We initially handled recruiting in a Google Sheet, but it started getting unwieldy, so we knew we needed a more sophisticated tool. Recruiterbox is like a CRM for handling candidates. It allows you to enter their CV, write and trade notes around particular candidates, move them through the recruiting funnel and more. This became a really invaluable tool for us as we were looking for more engineers.
Gunderson has a great reputation, especially for later-stage startups, but we found that they weren't such a good fit for an early-stage startup like us - we racked up huge bills with them getting answers to basic questions. We love our current law firm, Cyr Barnes, and they specialize in IP, M&A and early-stage startups. I can't recommend them highly enough.
We're too small to hire a regular PR firm, so we use a part-time person for PR tasks. We also like Wakefield, the daily newsletter from Uncubed that covers all sorts of news in the digital community. If they like your story, they'll come to your company and do a piece on you to tell your story and try to get you more coverage on their huge mailing list.
Trello is great. It’s our post-it board in the cloud.
Google Docs is awesome. The product has gotten better and better and better to the point that's it's practically invisible now and crucial on a daily basis. I love team commenting, for instance. I've become a big fan of this often overlooked, not particularly sexy, product.