Not really. I keep my eye on this area as I generally transcribe my podcasts. But compared to ~$1.50/minute for human transcriptions that require minimal touchup for even fairly tech-heavy topics, nothing I've seen that's purely ML/computer-based comes close to being worth my time to deal with.
Julius[1] can do this. But the accuracy depends on the language model you are using, and unfortunately the free English language model (VoxForge) is not the best.