EmailOctopus vs Mailerflow: Which Fits a Tight Budget?

EmailOctopus vs Mailerflow comes down to two different pricing models: EmailOctopus charges by subscriber count with a monthly email allowance attached, while Mailerflow charges by contacts and gives you unlimited emails on every paid plan. EmailOctopus is a clean, low-cost newsletter tool with a genuinely usable free tier and a cheap Pro plan; Mailerflow is built for senders whose volume grows faster than their list, with an AI email builder, visual automations and a transactional API on top. Which one fits depends on whether you need volume, AI help and transactional sending, or just a tidy, affordable way to send a newsletter.

EmailOctopus vs Mailerflow: the short answer

If you have under 2,500 subscribers and send a predictable, modest number of emails each month, EmailOctopus's free Starter plan is hard to argue with — it includes 10,000 emails a month, one landing page, one form and one user, verified on 11 October 2026 on emailoctopus.com/pricing. Pro starts at $9/month billed yearly and lifts the design and reporting limits.

Mailerflow makes more sense when your sending volume is the constraint rather than your contact count. Paid plans start at €9.90/month with unlimited emails, and the platform leans on AI for building emails and automations, plus a transactional email API for product and developer teams. Both are budget-friendly; they just optimise for different things.

Comparison table (verified on 11 October 2026)

EmailOctopus facts below were checked on 11 October 2026 on emailoctopus.com/pricing. Mailerflow facts come from Mailerflow's own plan documentation. Prices and limits change — confirm on the official pages before you commit.

Pricing and plan limits: where the two models diverge

The structural difference is simple. EmailOctopus prices by subscriber count and attaches an email allowance to each tier. Mailerflow prices by contacts and removes the email cap on paid plans. That distinction only matters when your sending frequency is high relative to your list size — which is exactly the situation many senders drift into.

Two illustrative examples (made up for the maths, not real customers):

A 4,000-contact list sending twice a week. That's roughly 8 sends a month, or about 32,000 emails. On a model with a 10,000-email allowance, the email volume — not the contact count — is what pushes you up a tier. On Mailerflow, a 4,000-contact list sits on the Starter plan at €9.90/month with unlimited emails.

A 12,000-contact list sending weekly. About 48,000 emails a month. Here both the contact count and the volume matter, and you'd price the equivalent tiers on each side before deciding.

EmailOctopus's 10% yearly saving and 20% lifetime nonprofit discount are worth factoring in, and its custom plans above 500,000 subscribers give large lists a path that isn't a public price list. Mailerflow's yearly billing costs the same as 10 months, and eligible paid plans include free migration help covering contacts, suppression lists, templates and core automations — useful if moving is the thing holding you back.

Email editor and templates

EmailOctopus Pro includes full control over email design, per the verified pricing page. Mailerflow offers a visual block editor (headings, heroes, products, columns, social links) with reusable templates, plus an AI email builder: describe the email you want and it returns a complete responsive design along with subject lines and preview text. If you enjoy designing from scratch, the block editor is the part you'll use; if you'd rather start from a draft than a blank canvas, the AI builder saves the first twenty minutes.

Automation: what each one actually lets you build

Mailerflow's automations are visual, with waits, conditions, webhooks and AI steps, triggered by signups, events, dates, inactivity or website behaviour. There's also an AI automation builder: describe a workflow in a sentence and it drafts the trigger, waits, conditions and emails for you to review before activation.

For EmailOctopus, the verified pricing facts don't cover automation, so treat this as a check-it-yourself item: read the official docs for current automation capabilities and limits before you assume anything either way. Automation depth is one of the areas where plans in this price bracket differ most, and it's worth ten minutes of reading.

Segmentation and personalization

Mailerflow builds dynamic segments on fields, tags, engagement, events and website behaviour, and can generate a segment from a plain-language description. Personalization steps and website-behaviour data (via a JS SDK) let you tailor an email to what a contact actually read or did.

One segment worth building regardless of tool: people who clicked a pricing link in the last 30 days but never purchased. That group is small, warm and easy to write a specific email for — usually a better use of an afternoon than another broadcast. EmailOctopus supports segmentation; for the specifics of how segments are defined and combined, check their documentation.

Deliverability and sending infrastructure

Mailerflow sends from your own domain with guided DKIM, SPF and DMARC setup and automatic verification, suppresses bounces and complaints automatically, and applies reputation monitoring and warm-up limits.

Worth saying plainly: deliverability depends far more on list quality and sending consistency than on which tool you pick. A clean, engaged list on either platform will outperform a purchased list on the other. For EmailOctopus's infrastructure and deliverability guidance, check their official documentation rather than relying on second-hand claims.

Transactional email, API and integrations

This is the clearest structural difference for developers and product teams. Mailerflow provides a transactional email API on a high-priority lane with templates and variables, a REST API with scoped keys, idempotency keys, an OpenAPI spec, code samples and a JS SDK, plus signed real-time webhooks with retries and delivery logs. If you want order confirmations, password resets and campaign email in one place, that matters.

EmailOctopus does publish API documentation — check it directly for current endpoints and limits rather than assuming parity in either direction.

Support, data location and compliance

Mailerflow hosts data in Europe and provides GDPR tooling: data export, erasure, consent logs and configurable retention. Embeddable signup forms support double opt-in and keep consent records, which is the part auditors tend to ask about.

The verified EmailOctopus facts cover plan-level items such as users per plan and report retention; for support channels and data location, go to the official site. If GDPR posture is a deciding factor for you, compare the two data processing agreements side by side before choosing.

Which one to choose for budget-conscious senders

Choose EmailOctopus if: you're under 2,500 subscribers and want a free tier with a real sending allowance; you send a predictable, modest volume each month; you want the lowest headline price for a straightforward newsletter; or you're a nonprofit and the 20% lifetime discount applies to you. It's a well-established, deliberately simple tool, and simplicity is a feature when your email programme is one newsletter and a welcome sequence.

Choose Mailerflow if: your email volume is growing faster than your contact count; you want AI help writing emails and drafting automations; you need transactional email alongside campaigns; you want EU data hosting and GDPR tooling built in; or you'd rather not track a monthly email allowance at all. See Mailerflow's features for the full picture.

Decide in ten minutes: count your contacts, estimate your monthly sends (contacts × sends per month), list your three must-have features, then price both platforms at your actual numbers. The email volume line is the one that usually changes the answer.

This article is the pillar piece of our EmailOctopus Comparisons cluster; supporting articles on specific scenarios will be linked here as they publish.

FAQ

Is EmailOctopus free? Yes. The Starter plan is free for up to 2,500 subscribers with 10,000 emails a month, per emailoctopus.com/pricing, verified 11 October 2026. It includes EmailOctopus branding on emails and 30-day report retention.

Does EmailOctopus offer a free trial? No — the same source states there is no free trial. The free Starter plan serves that purpose instead.

How much is EmailOctopus Pro? $9 per month billed yearly, including 10,000 emails a month, full design control, reports retained forever, and unlimited landing pages, forms and users (verified 11 October 2026).

Does Mailerflow have a free plan? Yes: 2,500 contacts and 10,000 emails a month, with 3 active automations and 100 AI actions a month. Paid plans start at €9.90/month.

What does "unlimited emails" mean on Mailerflow paid plans? There's no monthly send cap on paid plans. Normal fair-use and deliverability limits still apply — you can't send unlimited email to a list that isn't engaged, and reputation monitoring and warm-up limits exist for a reason.

Can I migrate my list? Mailerflow imports CSV files with duplicate and validity checks, and supports custom fields and tags. Eligible paid plans also include free migration help with contacts, suppression lists, templates and core automations.

Ready to compare at your own numbers? Try Mailerflow on the Free plan — 2,500 contacts, 10,000 emails a month and the AI automation builder included — import your contacts by CSV, and ask about free migration help on eligible paid plans.