Almost every partner program eventually lands on the same idea: run a joint webinar. It is low-risk, obviously mutually beneficial, and easy to agree to. Then it underperforms, and the conclusion drawn is usually that webinars do not work.
Webinars work. What usually failed was that the event was treated as a favour to keep a partner relationship warm rather than a demand-gen motion with an owner and a follow-up plan. Tooling will not fix that. But the wrong tooling will actively make a well-designed one harder.
What co-marketing asks for that solo webinars do not
Two audiences, two lists. A joint webinar has a registration flow that needs to work for people who have never heard of you. Anything requiring a download or an account creation step costs you your partner's audience specifically, because they have the least motivation to push through friction.
Shared hosting that is not awkward. Your partner needs to present, not just attend. Co-host permissions that require a call beforehand to sort out are a recurring tax on every event.
Follow-up you both can act on. The single most common failure is that registration and attendance data sits with whoever hosted, and the partner gets a spreadsheet three days later, by which point the leads are cold. Check what can actually be shared before you pick.
Nobody's full-time job. In most partner programs the person running the webinar also does five other things. A platform that needs a specialist is a platform that will end up used once.
How to choose
Start with where your partners already are. A tool your partner's team already knows removes an entire category of friction, and that is worth more than a feature comparison in most cases.
If you are running these regularly and the follow-up motion matters, prioritise built-in registration and post-event data over presentation features. If you are running one event to test the motion, use whatever both sides already have and put the effort into promotion instead.
Before you book the date
The platform matters less than whether you picked the right partner to run it with. Real audience overlap is what makes a joint webinar work, and that is a partner-selection question rather than an events one. It is the same question RevRadius is built to answer.
For the program-design side, including why most of these underperform and what to do about it, see Running Partner Webinars That Actually Drive Pipeline.