How to sell an idea to Amazon
No stated policy
Amazon does not say whether it reads outside ideas. Its terms say material you submit grants it a royalty-free, perpetual license. It bought Ring and Zappos.
Read off Amazon's own pages on

What you agree to by sending something
“If you do post content or submit material, and unless we indicate otherwise, you grant”
“Amazon a nonexclusive, royalty-free, perpetual, irrevocable, and fully sublicensable”
What it has bought from outside
- 2018
Ring (video doorbells) from Jamie Siminoff approximately $839 million
“On April 12, 2018, Ring was acquired by Amazon for approximately $839 million.…” en.wikipedia.org
- 2009
Zappos from Nick Swinmurn / Tony Hsieh around $1.2 billion
“In July 2009, Amazon acquired Zappos in an all-stock deal worth around $1.2 billion at the time.…” en.wikipedia.org
Other companies that take an invention or product idea
3MHas a submission portal3M takes ideas for patented products through a form on its idea submission policy page, which asks for the patent.
Acroterion, CC BY-SA 4.0 Colgate-PalmoliveHas a submission portalColgate-Palmolive takes product ideas through its submission website, colgatepalmolive.yet2.com, and pays nothing for a first submission.
en:User:DG, Public domain General MillsHas a submission portalGeneral Mills seeks outside partners through G-WIN, its Worldwide Innovation Network, and its Work with us page takes food solutions and…
Nyttend, Public domain Mondelēz InternationalHas a submission portalMondelēz takes new technologies and innovations through its Innovation OI Portal at mdlzcollaboration.com, unpaid at first.
Ralff Nestor Nacor, CC BY-SA 4.0 PepsiCoHas a submission portalPepsiCo accepts no unsolicited ideas, and anything sent is PepsiCo’s to use.
Tony Webster, CC BY 2.0 Procter & GambleHas a submission portalP&G looks for products and technology from outside innovators and patent holders through Connect + Develop.
Guilhem Vellut from Annecy, France, CC BY 2.0 QVCOpen applicationQVC looks for new products its customers will love, and brings vendors and entrepreneurs onto its broadcast and digital channels through…
掬茶, CC BY-SA 3.0 Stanley Black & DeckerHas a submission portalStanley Black & Decker calls makers, creators and inventors to its Open Innovation Sprint, at stanleyblackanddecker.com/submityouridea.
Leefisher91, CC BY-SA 4.0