Is Facteur cheaper than Mailisk?

At equal volume we sit level with them or slightly under, at each of their tiers — a constraint we impose on ourselves and that an automated test checks every time the grid changes. Between two of their tiers the gap widens in our favour, but through their bracketing rather than our price: they bill the tier above where we bill the volume consumed.

Why do you keep messages longer?

Because that is the only real cost of a test email: storing it for the period announced. A service that keeps mail for less time can show a lower price without being cheaper — it is simply selling something else. If your tests read nothing older than a few days, the difference does not concern you, and performance mode stores nothing at all.

What happens if I go over my volume?

You can buy capacity packs, cumulative and valid for a year, or pay as you go within a spending cap you set. Beyond that, messages are refused and nothing is charged. Mailisk tolerates the overage and contacts you afterwards: their approach is more forgiving, ours more predictable.

Can I migrate from Mailisk to Facteur?

Yes, and most of the work is replacing the receiving subdomain and the API endpoint in your tests. Messages already received there are not transferred: they are test data, and they regenerate on your suite’s next run.

Facteur vs Mailisk

Comparison

Facteur vs Mailisk: which one should you pick?

Mailisk is the cheapest email testing service we know of, and our grid is calibrated against theirs: at equal volume we sit level with them or slightly under. Price will not decide much.

What decides is how long the mail is kept. They hold it for a fortnight at most, on every plan; we hold it several times longer, and that is what a test email actually costs.

What separates them

	Facteur	Mailisk
Maximum retention	Several times theirs, set inbox by inbox	Capped on every plan, including the dearest
Message volume	Bought separately, as packs valid for a year	Fixed by the subscription tier
Granularity	You pay for the volume you consume	You pay for the tier above
Going over	Prepaid packs, or capped pay-as-you-go	Tolerated, then a conversation
Per-inbox quotas	Yes, with overage alerts	Not documented
Hosting	France, billed in euros	Outside France, billed in dollars
DPA	Downloadable online	On request

What Mailisk does better

They do not cut you off when you go over. Their plan tolerates the overage and the team writes to you afterwards, where we refuse messages once the ceiling is reached. For a test suite that runs away on a Friday evening, that is real comfort.
SSO is included from their first paid plan, earlier than ours. If that is your only constraint and your volume is low, they answer it for less.
They also send test mail, which we do not: we stop at reception.
Their product has been around longer than ours, with the shaking-out that implies. We are starting.

Choose Mailisk if…

Your tests never read a message older than a few days, you want to exceed your volume without being blocked, or you need to send as much as you receive. Those are three good reasons, and we have nothing to say against the last two.

mailisk.com

Choose Facteur if…

You replay scenarios over weeks rather than days, your volume falls between two of their tiers — you pay for the tier above with them, and for what you consume with us — or European hosting and a DPA you can sign without going through a salesperson are among your constraints.

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The prices, at their source

Their amounts are read from the data their own pricing page serves, not copied from a screenshot. These are their monthly prices; their annual formula is cheaper, as is ours.

Facteur

Solo8 €/mo
Team39 €/mo
Business99 €/mo

Mailisk

20 000 emails par mois, 10 namespaces8 €/mo
100 000 emails par mois, 200 SMS27 €/mo
200 000 emails par mois, 600 SMS45 €/mo
500 000 emails par mois, 1 200 SMS73 €/mo
1 000 000 emails par mois, 2 400 SMS109 €/mo

Converted from US dollars at 0.92, read on 11 August 2026.

Where these figures come from

Cinq plans relevés le 11 août 2026 dans les données de rendu de mailisk.com, où la page tarifaire les publie : 9, 29, 49, 79 et 119 $ par mois. Ce sont les tarifs mensuels ; leur formule annuelle vaut dix mensualités.
Dépassement facturé à partir de 0,25 $ par tranche de 1 000 emails reçus, et le plan ne coupe pas au plafond — leur page annonce une tolérance temporaire, suivie d’une prise de contact.
La rétention publiée plafonne à 15 jours sur tous les plans, y compris le plus cher. C’est la différence qui explique l’essentiel de l’écart de prix, et c’est pour cela qu’elle est relevée ici plan par plan.
Le SSO est inclus sur l’ensemble des plans payants, dès le premier.

mailisk.com/pricing

Frequently asked questions

Is Facteur cheaper than Mailisk?: At equal volume we sit level with them or slightly under, at each of their tiers — a constraint we impose on ourselves and that an automated test checks every time the grid changes. Between two of their tiers the gap widens in our favour, but through their bracketing rather than our price: they bill the tier above where we bill the volume consumed.
Why do you keep messages longer?: Because that is the only real cost of a test email: storing it for the period announced. A service that keeps mail for less time can show a lower price without being cheaper — it is simply selling something else. If your tests read nothing older than a few days, the difference does not concern you, and performance mode stores nothing at all.
What happens if I go over my volume?: You can buy capacity packs, cumulative and valid for a year, or pay as you go within a spending cap you set. Beyond that, messages are refused and nothing is charged. Mailisk tolerates the overage and contacts you afterwards: their approach is more forgiving, ours more predictable.
Can I migrate from Mailisk to Facteur?: Yes, and most of the work is replacing the receiving subdomain and the API endpoint in your tests. Messages already received there are not transferred: they are test data, and they regenerate on your suite’s next run.

Other comparisons: Mailtrap · MailSlurp · Mailpit · Mailosaur

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