I started a similar company, Shopobot. We launched, raised, got good press. Things looked great!
Shortly after we watched as Decide and Priceonomics launched.
After months of beating our head against the wall, we came to the conclusion that we weren't competing against Decide and Priceonomics. We were competing against Amazon.
Everyone we talked to loved the idea. But we found their praise didn't turn into clicks. We'd ask them why, and they'd always say, "oh, I just went to Amazon."
One day our lead dev was telling me about a recent purchase and I asked him if he used our site to find a good price. "No, I just used Amazon. I have Prime." That's when I knew we were fucked. Competing against Amazon without a really really strong value prop is not easy.
We've long since pivoted, Decide shut down, and now Priceonomics is perhaps pivoting. I think CamelCamelCamel is still at it! After all the VC money flushed out, the bootstrapper is still standing. :)
This reminds me, I have a long blog post to finish about how comparison shopping and price guides are difficult to pull off.