Lemlist is probably the closest fit if you're looking for something that bundles warmup with multichannel outreach. The tool itself has matured a lot-used to be just a cold email platform, but now they've layered in LinkedIn automation and decent deliverability features under one roof.
i've seen a pattern lately where marketers try to stitch together three or four separate tools for email, LinkedIn, and warmup. It works, but the complexity creates friction. Lemlist's advantage is that warmup is baked in, so you don't have to trust a third-party service to keep your domain healthy while you're blasting campaigns. The tradeoff is that their multi-channel capabilities aren't as deep as, say, combining Mailshake with a dedicated LinkedIn scraper. but for most mid-size operations, the simplicity wins.
Think of it like a Swiss Army knife versus a set of specialised chef's knives. If you need to prep a dozen different meals every day, specialists are better. If you just need to open a bottle, cut some rope, and slice an apple, the Swiss Army knife saves you time. Lemlist is that knife.