Not really, no. They're like Nine Inch Nails in that there are a lot of bands that you might like if you like them. But they're also completely different and unique in ways that don't apply to a lot of successful artists.
Someone mentioned Boards of Canada. If you like Massive Attack, you might also like them. They're great! But they don't sound like Massive Attack, imo. Best I can recommend is the first album by Sneaker Pimps. That also doesn't sound at all like Massive Attack. MA is just in their own league.
As a life long fan of Massive Attack, Im afraid I cannot tell you of any other band I found to match (matter of taste of course) but there are plenty good ones with a similar vibe
Tricky (of course, ex member of massive Attack)
IAMX (first few albums)
Sneaker Pimps
The thievery corporation (earlier stuff is more similar)
Portishead (good but very very melancholic)
Goldfrapp (early stuff)
DJ shadow
Yonderboi (all three albums are amazing, less electronic but he has a very special sound)
Ancient Astronauts
Nightmares on Wax
So, some of these would actually sound similar, many just give me the same vibe... As in, if you are playing a list of all those, it should more or less blend together...