Ask HN: Is there a third party tool for Gmail smart compose like feature?

I want to display autocomplete text in textboxes on my website. The problem is users have to write a lot, which takes time. I want to make their lives easier by providing autocomplete suggestions as they are tying to enable faster typing. Preferably i would like to use my data for auto-complete suggestion as my data will be more relevant. Is there any free/paid service that can help me do this?