As a startup, I couldn't find a tool that was simple and easy to use, but my contacts kept growing, and a spreadsheet wasn't working anymore, and was draining all my energy. I did a search and found less annoying. They have the best team, and customer service, also "in a less annoying way," and have helped me grow and organize my contacts, so its sustainable, I use it every time I interact with a new potential client. They have also a really useful mailchimp integration, so I was able to take apart my long contact list, and just integrate into less annoying, so as I add new contacts they are merged, in the easiest way. This way I can send our relevant information to segmented groups. I can't wait to integrate it further into my website. If you are a startup at day one or day 500, stop messing around and get Less Annoying.