Read any global "top ESPs" listicle and you will meet the same cast: Mailchimp, SendGrid, Amazon SES, Brevo. All real, all large — and all nearly irrelevant if you are trying to reach inboxes in São Paulo, Lyon or Osaka. When we sliced our DNS dataset by country (using the 2026-04-28 regional snapshot of the Tranco top-1M, part of the daily series whose latest cut is the 2026-07-05 snapshot), the global averages fell apart into a set of national markets, each with a local champion that international coverage simply never mentions.
The method: for each country's domains in the Tranco top-1M, we look at which ESPs their SPF records authorise, and compute each provider's share of that country's ESP-classified SPF domains. Everything below is reproducible from the daily email infrastructure report.
The national champions, in one table
| Country | Local leader | Share of ESP-classified SPF domains |
|---|---|---|
| Brazil | Locaweb | 42.58% (2,090 domains) |
| Russia | Unisender | 38.21% |
| France | Mailjet | 35.88% |
| India | MailHostBox | 29.29% |
| Italy | MailUp | 22.9% |
| Switzerland | Infomaniak | 20.86% (#2 overall) |
| Sweden | APSIS | 16.72% (#3 overall) |
| Japan | Amazon SES | 16.79%, with SecureMX at 12.14% |
Even where a global name tops the chart, the pattern is regional, not global. Mailchimp is #1 in the UK, Australia, Canada and Spain — but at 20–24%, far from a monopoly. Mandrill, its transactional sibling, is #1 in Germany, the Netherlands, Belgium and Switzerland at 25–27%. And Japan's top ten includes names like Repica (in third place), plus Kagoya, MailWise, ActiveGate, Tricorn and CrmStyle — each of which serves a client base that is 100% Japanese.
That last statistic generalises: at least 8 ESPs in our dataset serve a single country exclusively. Greece's ContactPigeon is 100% local. Brazil's KingHost has a client base that is 99.8% Brazilian. These are not small businesses — they are national infrastructure that happens to be invisible from outside.
Why global surveys can't see any of this
None of this is hidden; it is public DNS. Global rankings miss it for structural reasons:
- Sample weighting. A global top-1M list is dominated by the largest internet economies, so a provider with 40% of Brazil registers as a rounding error in the worldwide average. Locaweb's 42.58% national share corresponds to about 2,090 top-1M domains — a "long tail" entry globally, a monopoly locally.
- Language and sales walls. Local champions sell in the local language, invoice in the local currency and integrate with local platforms. English-language analysts rarely encounter them at all.
- Deliverability to local ISPs. National providers survive because they are good at the mailbox providers that matter locally — relationships and tuning that global ESPs historically underinvested in. Japan is the extreme case; we cover it in a dedicated article on the Japanese stack.
Country shares are computed over each country's domains that appear in the Tranco top-1M and whose SPF includes a classified ESP. Smaller domestic sites that never enter the top-1M are undercounted, and SPF flattening hides some providers entirely — so treat these as conservative floors for local-champion dominance, not ceilings.
What this means if you send internationally
For an email marketer, the country map has three practical consequences:
- Your competitors' tooling differs by market. In France, the emails your prospects already receive are disproportionately built and sent through Mailjet; in Italy, MailUp. Local inboxes are trained on local senders' patterns — formats, cadences, unsubscribe conventions.
- ESP shortlists should be per-market. If you are expanding into Europe, the shortlist question is not "which global ESP is best" but "which provider is strong in this country's mailbox ecosystem" — we walk through the European version of that decision here.
- Placement must be tested per-market too. A sender with flawless Gmail placement can land in spam at a national ISP it has never warmed up against. Seed-testing against mailboxes in your actual target countries — not just the big four US providers — is the only way to know before your recipients do.