dev.to is one of the few cases on this list where the honest answer isn't "pick one" — it's a platform many developers use alongside a primary blog rather than instead of one, because of one specific feature: canonical URL support.
For the wider landscape of options, see best developer blogging platforms.
What dev.to actually is
dev.to (the DEV Community) is a free, open-source publishing platform built around a public feed, tags, reactions, and comments. It has real network effects — a well-tagged post can get in front of a large, engaged developer audience that a brand-new personal blog simply doesn't have yet.
The detail that changes the comparison: dev.to lets you set a canonical_url field on a post, telling search engines that the "real," authoritative version lives at a URL you specify — your own blog. That means you can post the same content to dev.to for community reach and reactions, while the SEO credit still flows to your own domain.
Where it's not a full replacement for your own blog
Without setting a canonical URL, a post published only on dev.to lives entirely on someone else's domain — no custom domain support for individual posts, no control over layout beyond dev.to's theme, and no ownership of the underlying file. It's a community feed, not a hosting platform for your primary body of work.
Where Blogizi fits
Blogizi is built to be that primary destination: Markdown files you write locally, published with blogizi publish, hosted on your own domain with sitemaps, canonical URLs, and OG images handled automatically — see the technical SEO checklist. See blogging from your terminal for the full CLI workflow, including blogizi draft, which can generate the post from your actual codebase and git history in the first place.
The actual decision
Use dev.to as your only outlet if: community reactions and discovery matter more to you right now than building long-term SEO equity on your own domain.
Use Blogizi as your home base if: you want the canonical version of your writing to live somewhere you control, with search value accruing to your own domain over time.
Use both if: you want the reach dev.to's feed offers without giving up SEO ownership — publish on Blogizi first, then cross-post to dev.to with the canonical URL pointed back. This is the setup most developers who use dev.to seriously actually land on, rather than treating it as an exclusive choice.