# Compare email sending platforms on evidence, not promises Source: https://postmetry.com/en/routeurs/ Email sending platform comparison Three distinct sources, never mixed: the **reference sheet**, what the vendor documents and we verify; the **corpus**, what we observe in the emails received; the **Postmetry analysis**, when the two don't agree. 49 **sending platforms in the reference sheet** 21 **capabilities, the same for everyone** 1590 **emails analyzed** 0 **cell filled in by deduction** - [Marketing généraliste 8 sending platforms](https://postmetry.com?famille=marketing) - [E-commerce 4 sending platforms](https://postmetry.com?famille=ecommerce) - [Enterprise 5 sending platforms](https://postmetry.com?famille=enterprise) - [API / Transactionnel 6 sending platforms](https://postmetry.com?famille=api) - [Européens 7 sending platforms](https://postmetry.com?famille=europe) Postmetry reference sheet ## What each sending platform allows, capability by capability 21 capabilities across 4 families. Hover over a column to isolate it, click to keep it pinned. Yes Partially No Not checked — nobody has gone to look yet Not applicable — the question doesn't arise | Capability Source · check date | [AWeber](https://postmetry.com/en/routeurs/aweber/) none corpus | [ActiveCampaign](https://postmetry.com/en/routeurs/activecampaign/) États-Unis none corpus | [Brevo](https://postmetry.com/en/routeurs/brevo/) France 30 brands corpus | [Constant Contact](https://postmetry.com/en/routeurs/constant-contact/) none corpus | [GetResponse](https://postmetry.com/en/routeurs/getresponse/) none corpus | [HubSpot](https://postmetry.com/en/routeurs/hubspot/) États-Unis 2 brands corpus | [Mailchimp](https://postmetry.com/en/routeurs/mailchimp/) États-Unis 7 brands corpus | [MailerLite](https://postmetry.com/en/routeurs/mailerlite/) 2 brands corpus | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | | | | | | | | | | | Open pixel Vendor documentation | Yes | Not verified | Yes | Not verified | Not verified | Yes | Yes | Yes | | Click tracking Vendor documentation | Yes | Not verified | Yes | Not verified | Not verified | Yes | Yes | Yes | | Exclusion by campaign | Not verified | Not verified | Partially | Not verified | Not verified | Yes | Yes | Yes | | Exclusion by contact Observed in the tool | Not verified | Not verified | Yes | Not verified | Not verified | Not verified | Not verified | Not verified | | Consent — absence means no pixel Observed in the tool | Not verified | No | Yes | Not verified | Not verified | No | No | Not verified | | Native consent collection Vendor documentation | Not verified | Non vérifié | Yes | Non vérifié | Non vérifié | Non vérifié | Non vérifié | Not verified | | Tracking anonymization Vendor documentation | Not verified | Not verified | Yes | Not verified | Not verified | Not verified | Not verified | Not verified | | Traceable choice Observed in the tool | Not verified | Not verified | Partially | Not verified | Not verified | Not verified | Not verified | Not verified | | | | | | | | | | | | List-Unsubscribe Vendor documentation | Yes | Not verified | Yes | Not verified | Not verified | Not verified | Yes | Yes | | RFC 8058 — one click Vendor documentation | Yes | Not verified | Yes | Not verified | Not verified | Not verified | Not verified Observed | Yes | | Preferences page Vendor documentation | Partially | Not verified | Not verified | Not verified | Not verified | Not verified | Not verified | Yes | | Transactional exceptions Vendor documentation | Not verified | Not verified | Partially | Not verified | Not verified | Yes | Yes | No | | | | | | | | | | | | DKIM Vendor documentation | Yes | Not verified | Yes | Not verified | Not verified | Yes | Yes | Yes | | SPF Vendor documentation | Not applicable | Not verified | Not verified Observed | Not verified | Not verified | Not applicable | Not verified Observed | Yes | | DMARC Vendor documentation | Yes | Not verified | Yes | Not verified | Not verified | Yes | Yes | Yes | | Sending domain Vendor documentation | Yes | Not verified | Partially | Not verified | Not verified | Yes | Not verified | Yes | | Tracking domain Vendor documentation | Partially | Not verified | Not verified | Not verified | Not verified | Yes | Partially | Yes | | | | | | | | | | | | Logging Vendor documentation | Not verified | Not verified | Not verified | Not verified | Not verified | Yes | Not verified | Not verified | | API Vendor documentation | Yes | Not verified | Not verified | Yes | Not verified | Yes | Not verified | Yes | | Consent history Vendor documentation | Not verified | Not verified | Partially | Not verified | Not verified | Yes | Partially | Partially | | Granularity of settings Vendor documentation | Partially | Not verified | Yes | Not verified | Not verified | Partially | Partially | Partially | | | | | | | | | | | | Vendor | Non vérifié | ActiveCampaign | Brevo | Non vérifié | Non vérifié | HubSpot | Intuit | Non vérifié | | Headquarters country | Non vérifié | États-Unis | France | Non vérifié | Non vérifié | États-Unis | États-Unis | Non vérifié | | Data regions | Non vérifié | International | UE, selon l'offre | Non vérifié | Non vérifié | UE ou US | International | Non vérifié | | Sheet last reviewed on | 11/09/2026 | 04/08/2026 | 11/09/2026 | 11/09/2026 | Non vérifié | 11/09/2026 | 16/08/2026 | 11/09/2026 | Postmetry corpus ## Observed in our corpus What brands actually send with these sending platforms. Nothing from the reference sheet here: only what has arrived in an inbox, from addresses we control. 249 **brands observed** 1590 **messages** 09/14/2026 **last message** Open pixel loaded share of received messages that embed a tracking image Brevo 100 % 181 messages out of 181 Mailchimp 100 % 54 messages out of 54 RFC 8058 declared share of messages that declare one-click unsubscribing Brevo 86 % 156 messages out of 181 Mailchimp 100 % 54 messages out of 54 List-Unsubscribe present share of messages carrying the header Brevo 86 % 156 messages out of 181 Mailchimp 100 % 54 messages out of 54 Brand's tracking domain share of tracked emails whose domain belongs to the brand Brevo 0 % 0 messages out of 158 Mailchimp 0 % 0 messages out of 54 4 sending platforms in this family have not yet sent any message into the corpus, so they do not appear in these bars : AWeber, ActiveCampaign, Constant Contact, GetResponse. Observed below the threshold of 30 messages, so with no published rate : HubSpot (11), MailerLite (28). The market ## What professionals search for Search interest is not a measure of quality or market share. Google Trends — worldwide, . Relative index from 0 to 100 over the period, recalculated by Google for **this family only**: values from one family are not comparable to another's. Export uploaded by hand, no request made from this page. Hover over a line or a name to isolate it, click to hide it. A sending platform's page opens from its column header, further up. ## What the compared capabilities mean **Open pixel** An individualized remote image, loaded when the message is opened. The capability says the platform knows how to insert one — not that it does so on every email. **Click tracking** The rewriting of links to count clicks. A treatment of the same nature as the pixel — individualized tracking — and enabled by default on every sending platform. **Exclusion by campaign** Sending a given campaign without inserting the open pixel. **Exclusion by contact** Removing the pixel for certain recipients only, while still sending them the message. **Consent — absence means no pixel** Without recorded consent, the platform knows how to send the message without a pixel. It's the capability that decides. **Native consent collection** The platform collects consent to tracking through its own means — a form, a preference centre, a revocation link — and applies it to the email. Exposing an attribute that the brand fills in elsewhere doesn't count as collecting it. **Tracking anonymization** A mode advertised as “identifier-free.” It only holds if it stops loading an individualized image: Article 82 concerns access to the terminal, not what is collected afterwards. **Traceable choice** A field or mechanism that durably retains the contact's choice on open tracking, and that can be exported. **List-Unsubscribe** The header that declares an unsubscribe address or page to the email client. **RFC 8058 — one click** One-click unsubscribing, handled by the email client without opening a page. **Preferences page** A page where the recipient chooses what they receive, instead of cutting everything off or keeping it all. **Transactional exceptions** Excluding a service flow from commercial unsubscribe rules, without taking it out of the logs. **DKIM** The signing of the message by the sending domain. It's this signature that carries the selector we use to recognize the platform. **SPF** The authorization, published in DNS, for this platform to send on behalf of the domain. **DMARC** The alignment of the previous two with the domain visible to the recipient. The policy remains under the brand's control. **Sending domain** A brand's own domain in place of the platform's. Once configured, only the DKIM selector still gives the tool away. **Tracking domain** A brand's own CNAME for rewritten links and the pixel. Without it, every click from the recipient names the platform. **Logging** A dated, exportable log of setting changes. It's what answers the question the day someone asks since when. **API** A documented public interface, including for contact attributes — without which a recorded choice stays locked inside the tool. **Consent history** The retention of a contact's successive consent states, and their export. **Granularity of settings** The level at which a setting applies: account, list, campaign, contact. **The five states** **Yes**, **No**, **Partially**, **Not verified** — nobody has checked yet — and **Not applicable**, when the question does not arise for this service. After the grid ## Understanding these results A cell says what the tool *allows*, never what a brand has done with it. A sending platform that can turn the pixel off says nothing about the brands that did — a brand's report answers that. [Analyze one of my emails](https://postmetry.com/en/analyser/) ## How we document sending platforms Sources, verification dates, confidence levels, and what triggers a review. The same method as for measurements: what has not been observed is not written. [See the method](https://postmetry.com/en/methode/) ## Which sending platform sends your emails? It is read from the headers, not from a declaration. The report names it, and says where the findings are adjusted with that vendor. [Analyze one of my emails](https://postmetry.com/en/analyser/)