Scouring for decent werewolf erotica without spending a dime can be surprisingly fruitful if you know where the community hangs out. My top recommendation is the Serialized Fictions section on apps like Webnovel or Inkitt—they have a dedicated Paranormal Romance category, and writers often post the first 20-30 chapters of their series for free as a sample. These are usually ongoing, so if you get hooked, you might need to wait for daily unlocks or consider supporting later, but there's a huge backlog to start with.
Don't sleep on niche forums either. Places like the 'Paranormal Romance' sub-forum on Literotica, while older in design, have a trove of user-submitted stories. The tagging system is a bit messy, but searching 'werewolf' or 'shifter' brings up hundreds. Quality varies wildly from amateur hour to genuinely gripping slow-burns, but that's part of the charm—finding a hidden gem feels like a victory. I stumbled onto a series called 'Beneath the Blood Moon' there years ago and still think about its mate-bond tension.
A less obvious spot is Quotev. It skews younger, but some writers create incredibly detailed, spicy A/B/O universes there. The platform's strength is its social features; you can follow authors, join reading lists, and see what's trending in the werewolf/shifter tags. The free access is completely unlimited, which is a major plus. Just be prepared to sift through a lot of teen-rated content to find the properly adult material.