G2 API
G2 (g2.com) has 2 public methods: get product reviews and compare software products. Each costs 1 credit per completed run (1¢ with pay as you go); failed runs are free.
Unofficial. Not affiliated with or endorsed by G2.
Methods
2Gets the newest public G2 reviews for a software product, with reviewer details and review text, plus the product's overall rating and review count when G2's profile shows them. The public feed exposes up to 25 recent reviews.
Returns software name, star rating, review count, page link, reviews (role, company size, industry, stars, title, likes, dislikes, date, link)
Readg2.com/get_product_reviewsCompare two to four G2 software products in your chosen order, with ratings, review counts, pricing, trial availability, and category scores. Pricing and individual scores may be unavailable when G2 does not show them.
Returns per product: name, vendor, star rating, review count, starting price, free trial, page link, seven G2 category scores; comparison link
Readg2.com/compare_products