Writing in the Irish Examiner, Val Nolan called Reamde "one of the smartest, fastest-moving, and most consistently enjoyable novels of the year". It is, Nolan went on, a "painstakingly-researched, deftly-plotted roller-coaster of gigabytes and gunplay, a pitch-perfect pastiche of Robert Ludlum or Tom Clancy-style techno-thrillers and a comment on contemporary digitality and the ubiquity of online interconnectivity."
Rowan Kaiser for The A.V. Club gives Reamde an A− rating saying: "The marriage of the thrilling and the nerdy is what makes Reamde work, and it offers a glimpse at a fascinating writer making a welcome transition back into a more accessible style."
Kirkus Reviews sums up Reamde as: "An intriguing yarn—most geeky, and full of satisfying mayhem."
Cory Doctorow writes in his Boing Boing review: "Stephenson's several exquisitely choreographed shoot-outs (including an epic, 100+ page climactic mini-war) are filled with technical gubbins about guns that convey the real and genuine enthusiasm of a hardcore gun-nut, with so much verve, so much moment, that I found myself itching to find a firing range and try some of this stuff out for myself."
Michelle West, reviewing the novel for The Magazine of Fantasy & Science Fiction, did not consider the book to be science fiction and called it "a geek thriller." She wrote, "Even if I don't like characters Stephenson's created, I nonetheless find them engaging, and I read him in large part for his characters and the particular ways in which they process information and interact with the world. Of his novels, this has easily the most structurally solid ending. In feel, it's closest to Cryptonomicon, although all of the action takes place in the present, where information travels quickly, and cellphones and wifi are ubiquitous. I enjoyed it greatly, and I frequently laughed out loud at his descriptions or his dialogue; it read like a much shorter book."
In an interview, Paul Di Filippo called Reamde "the most gripping and funny and wise thriller I've ever read."
Entertainment Weekly called it "an ingenious epic" in their "Must List" column.