[5] The film had its world premiere at South by Southwest on 17 March 2021, and was released theatrically in the United Kingdom and Ireland on 18 February 2022 by Wildcard Distribution.

Here Before is produced by Rooks Nest Entertainment and financed by BBC Films, Pia Pressure and Northern Ireland Screen.

The website's consensus reads: "Resting its slowly twisting tale on a magnetic Andrea Riseborough performance, Here Before is a solidly unsettling effort from debuting writer-director Stacey Gregg.

"[9] Metacritic, which uses a weighted average, assigned the film a score of 69 out of 100, based on 13 critics, indicating "generally favorable" reviews.

"[11] Cath Clarke of The Guardian gave the film 3/5 stars, writing: "The question of whether this is a ghost story or if Laura is experiencing a kind of psychological breakdown twists and turns in ways that lost me by the end.

"[12] Kevin Maher of The Times also gave the film 3/5 stars, calling it "[an] inventive chiller from debut director Stacey Gregg.

"[13] Simran Hans of The Observer also gave the film 3/5 stars, writing: "Gregg crafts a spooky atmosphere charged with the supernatural.

Riseborough's intensity helps sell the idea of a possible otherworldly presence, but the script is less committed, faltering with a lacklustre ending.

"[15] Simon Abrams of RogerEbert.com gave the film 2.5/4 stars, writing: "There's certainly enough craft, soul, and intelligence on display to make Gregg's movie worth a look", but added: "There's also a few too many scenes that only succeed at repeating its evident fascination with grief as a personal and therefore only partly communicable experience.