Ask HN: Cheaper alternative to productboard? (A trello for product design)

I really liked using the design of productboard, which is task-management web SAAS.

So well done for them.

However, the pay-plan is too expensive for us as bootstrappers ($50/month/user, looks like it is targeted at larger corporations).

Can someone recommend similar products ?

productboard's pricing is based on users with full edit rights to product data. You can invite additional "contributor" users at no added cost. https://www.productboard.com/pricing