Big pros for me would be: * An elastic payment model, so we can start for free while volumes are still low * Out the box developer portal and docs generation * OAuth capabilities
The pricing in particular seems quite opaque from my many vendors, so would appreciate any real information on costs that people have.
Although I have no experience with any in particular, the experts I know are leaning towards the apparently most complete, mature and robust solution which we concluded to be AWS API Gateway, which in my view has an extremely high fidelity that's hard to reason against (though I'm looking forward to be proved wrong).
AWS API Gateway might probably have its own complexities and depending on what you're solving for specifically, might be way too much to take. But make no mistake, the knowledge you and your team will acquire is likely to payoff in the long run since I think it'll likely span across decades and continue to develop faster than most of its competitors. Though to be clear, I'm also for giving smaller businesses a fair shot.
We're making Saasform (see profile), but mostly focused on the SaaS. For example right now we don't support metered subscriptions. If interested please feel free to reach out directly.