I've known about ArduPilot for a long time, never even heard of HoverflyOpen. The only reference I found for HoverflyOpen is this: https://www.parallax.com/product/31500

Comparing that to the ArduBee isn't really much of a comparison. The only advantage I see is that HoverflyOpen currently exists, while ArduBee looks like they are still in the preparing-to-Kickstart phase.

If there's more out there for HoverflyOpen, please share it. I'll admit I didn't dig around much.

ArduPilot is a well-known and battle-tested platform.

That's really it: you can grab all the code and schems from there. There was a community but it shut down when the FAA regs about drones >250grams came out.

We are trying to shape ArduBee as an excellent platform for 100g-200g micro uav develop and to enable urban swarm experimentations, indoor and outdoor!

Very cool, but in that case definitely give Parallax a poke since they've been doing it for a while, it may save you some time and some mass.

Thanks! I'll do it, I've never visit Parallax site before

Hi! Makers from ArduBee here. Thanks a lot for this comment! As we have never heared of HoverflyOpen and we couldn't find much more than on this site, we can not really comment on it. But if you have more information, we would love to hear about it! Just based on the facts we can get from that site, it seems a quite priced Flight controller, where you do not know in which flight stack you could use it. Also you can not see how large the community of developers is around it. Arudupilot, which is our foundation for ArduBee, is Open Source and with a large user base and active, high talented developers working constantly on maintenance and improvements. ArduBee not only is a Flight controller (based on Ardupilot) but it's a full micro uav platform, with 4 x ESC BLHEli32 with telemetry, WIFI ESP8266, Li-Ion based with 18650 holders from easily swaps the battery, 1 facing down rangefinder for low height altitude, and last generation inertial sensors

The HoverflyOpen seems to just be a small part of the stack needed to build a swarm of drones. This project seems to be the full stack.