The Best Free & Paid Book Promo Sites, Ranked

Tier 1: BookBub Featured Deal

BookBub's Featured Deal is the gold standard of book promo sites — a single placement can drive thousands of downloads and meaningfully move your rank across the entire Kindle Store, not just your sub-category. The catch is acceptance rates are low; BookBub's editorial team is selective, and genre fiction with strong existing reviews has a much better shot than a debut with only a handful of ratings. It's also priced by genre popularity, so a Featured Deal in a competitive genre like Romance or Mystery costs substantially more than in a smaller category.

Worth submitting for every release, but don't build your promo calendar around counting on acceptance. Many authors submit to BookBub every time a new title or a price drop happens and treat it as a bonus when it lands rather than the anchor of the plan.

Tier 2: The reliable mid-tier stack

Freebooksy and BargainBooksy (same parent company as BookBub) are genre-targeted daily newsletters with solid open rates and straightforward submission — usually accepted within a reasonable review window if your book meets basic quality bars (cover, reviews, formatting). Bookdoggy and Fussy Librarian round out a dependable stack — individually more modest in reach than Freebooksy, but combined on the same promo day they add meaningfully to total downloads without requiring BookBub-level review counts or acceptance odds.

Booking 3–4 of these mid-tier sites on the same free-promo day is, in practice, the most cost-effective volume strategy for most indie authors — more predictable than gambling on a single premium placement.

Tier 3: Smaller and niche sites

Robin Reads, Book Runes, and various genre-specific Facebook-group-adjacent newsletters round out the ecosystem. Individually they move relatively small numbers, but they're inexpensive enough to add to a stack without much financial risk, and niche genre lists (particular sub-genres of romance or fantasy, for instance) sometimes convert surprisingly well because the audience is tightly matched to your book.

What actually matters when choosing

Two things predict a promo site's effectiveness for your specific book more than its general reputation: whether it has a genre category matching yours (a site strong in romance won't move much volume for hard science fiction), and its lead time for submission, since the good slots on the well-known sites fill up 1–3 weeks in advance. Build your promo calendar backward from submission deadlines, not forward from when you'd like the promo to start.

Paid discount promos vs. free promos

Most of the sites above also run "discount" or "bargain" placements for books priced $0.99–$2.99, not just fully free titles — useful if you don't want to burn one of your limited KDP Select free days, or if the title is wide and not enrolled in Select at all. A $0.99 discount promo through the same newsletter stack won't drive the same raw download volume as a free promo, but every copy sold earns royalty, and it still produces a meaningful rank and review-velocity boost.

Budgeting a realistic promo spend

A first-time promo stack of 3–4 mid-tier sites typically runs somewhere in the range of $30–$150 total depending on genre and which sites you choose, with romance and mystery generally costing more than smaller categories due to demand. Track the actual download and sales lift against that spend after each promo — over two or three cycles you'll have real data on which specific sites are worth repeating for your genre rather than going on reputation alone.

Timing promo sites around holidays and reading seasons

Reader attention and newsletter open rates shift with the calendar — summer beach-read season and the winter holiday period tend to see elevated reading and downloading activity in many genres, while the newsletter sites themselves get more crowded with submissions during these same peak windows, which can mean longer lead times or higher prices for the best slots. Cozy genres often see a seasonal bump around autumn and winter; light contemporary romance sometimes spikes in summer. Watching your own genre's seasonal patterns over a year or two of promos, rather than assuming every month behaves the same, helps you decide which windows are worth planning further ahead for and paying a premium to secure.

Reading a site's own submission guidelines closely

Each promo site publishes its own minimum requirements — a review count floor, a minimum average rating, formatting standards, sometimes even genre-specific content guidelines — and submitting without meeting them wastes both the submission fee (where one applies) and the lead time you spent waiting for a decision. It's worth actually reading a site's current guidelines in full before every submission rather than assuming they match what you remember from a previous promo, since sites do periodically update their acceptance criteria as their own subscriber base and reputation evolve.

Most rejection emails from these sites are generic and don't explain the specific reason, which can make it hard to know whether to try again next release or adjust something first — if a submission is rejected, double-checking against the site's published requirements (review count, rating, formatting) before resubmitting a future title is more productive than assuming the rejection was arbitrary or resubmitting the same book unchanged and hoping for a different outcome.