I completely get your points, but I like to run my startup as lean as possible. I plan for the future but I address the needs I have now. The software landscape changes rapidly, no company is sure they'll use the same vendors even 3 years from now. So why should I think about all the diverse integrations and advanced features I may need sometime in the future, if all goes well? As I always say, "it's always a good sign when you have those types of problems".
But for a startup, every dollar matters. Time matters for sure, but money matters probably even more (because, let's be honest, we don't necessarily use our time very efficiently anyways - the 80/20 rule applies here too).
Furthermore, I've never ran into a situation when a client or partner didn't want to e-sign a document because it was hosted on SignNow. The reality is that I (and probably most people) use signed documents only for legal reasons (basically to protect my company). In most cases, how those documents were signed rarely matters, because most startups can't afford going to court and will find a way to settle out of court. It's much more commonly used to say "look, it's written in this document and you signed it" when there's an argument, and that's usually enough to make the problem go away (at least, from a legal perspective).
Thank you guys. I'm giving RightSignature a test drive right now, as it provides some features I definitely appreciate (templates + editable fields).
I find their Personal plan a bit limited in terms of the number of reusable templates (1), but the price point seems right for the functionality they provide. The other recommended platforms (docracy, hellosign) don't seem to provide editable fields, so even if they're free, they're not as useful to me as RightSignature.