The album received mostly positive reviews from critics. Already Heard rated the album 4.5 out of 5 and said: "Black Flame is an undeniable step up for Bury Tomorrow, but also a record that points to the band's future ambitions. Its increased melodic death metal influence and electronic-led interludes point to a future in more mainstream metal songwriting. And while that might seem like a dreadful prospect to many listeners, let the confidence of this record remind you that Bury Tomorrow can readapt for bigger audiences without forgetting the ten years that took them up to this point." Zach Redrup from Dead Press! rated the album positively calling it: "Where Earthbound saw Bury Tomorrow treading along the line barely separating them from metalcore's finest, Black Flame shoves them right into the thick of and shoulder-to-shoulder with the genre's elite." Distorted Sound stated that "It's safe to say that BURY TOMORROW have surpassed themselves with Black Flame, and that their stock will go through the roof once it's out in the open for the world to hear. This is an absolutely superb album from one of the best bands to come out of the UK in recent years; long may their career continue." Exclaim! rated the album 7 out of 10 and said: "This isn't the instant ticket to stardom Bury Tomorrow might have wanted. However, it does solidify them as major heavyweights in an overcrowded scene — sometimes that's enough. But if these gents want to skyrocket to the next level as their heroes have, they'll have to put a bit more of a unique stamp on their music. What's here is great, but inoffensive." Alex Sievers from KillYourStereo gave the album 75 out of 100 and said: "Black Flame is a summarization of everything good about Bury Tomorrow's sound; melody, mosh, malevolence and meticulousness. For a band that's been grinding for over ten years now, their fifth album feels like the genuine start of a new beginning; a new leaf being turned over. It doesn't at all redefine what metalcore or heavy music in the modern era can be or sound like, but that was never ever once the intent on the band's part. It's a record solely meant to push them forward, not necessarily their wider genre. For this is an album made for Bury Tomorrow themselves and for their fans first, everyone else second." Louder Sound gave the album a very positive review, but stated: "On the strength of Black Flame's best songs, Bury Tomorrow could very well join Architects and Bullet for My Valentine in the upper echelons of British metal, but they really need to step out of the shadow of Killswitch Engage and forge their own path. This is a huge step forward for Southampton's finest, but doesn't quite feel like the finished product." Rock 'N' Load praised the album saying, "Heavy is heavy and melodic is sing along friendly as Black Flame creates a pivotal moment in the bands history and should easily push Bury Tomorrow in the direction that they are aiming. As the saying goes, there is no smoke without fire and this shows how hot Bury Tomorrow are." Sam Dignon of Rock Sins rated the album 8 out of 10 and said: "Black Flame is Bury Tomorrow trying their hardest to break through to that next level. It is their most ambitious effort to date and is up there with Earthbound as their best work. There is still room for the band to grow and hopefully they are able to develop what they've started here. There's always a lot of good will aimed at Bury Tomorrow so hopefully it all comes together this time."
