MailerQ vs SocketLabs (2026): which should you pick?

Pick MailerQ if

• Fits if you send millions of emails and run your own sending servers
• Makes sense if you want a console to manage IP warm-up and per-provider limits

Look elsewhere if

• Skip it if you want a hosted service, as it's software you install and run
• Pricey if you're small: €10,000 up front and €2,000 a year after
• Tight if you send a lot on Regular, which stops at 100K emails an hour and 10 domains
• Watch out: the trial length isn't stated, and the pages don't name supported operating systems

Pick SocketLabs if

• Fits if you send 40,000 emails or more a month and want delivery analytics
• Works for platforms that need subaccounts and IP pools

Look elsewhere if

• Pricey if you send little, as the cheapest plan is $39.95 a month for 40,000 emails
• Skip it if you want a free plan, because the free first month ends with sending stopped
• Tight if you need a dedicated IP, which starts on Pro at $89.95 a month
• Watch out: Spotlight Analytics is open only to Enterprise-level senders, per its FAQ
• Watch out: Core has one volume step of 40,000 emails; heavier senders move to Pro

MailerQ

• It is software you install and run on your own servers; the vendor describes it as on-premise, and it uses RabbitMQ and a MySQL or PostgreSQL database.
• Prices are in euros, per instance. Updates and support are an extra yearly charge of 20% of the license fee.
• The Regular license caps sending at 100K emails per hour and 10 domains.
• The pages do not name supported operating systems.

SocketLabs

• There is no permanent free plan; the free first month of Core ends with sending stopped unless you upgrade.
• A dedicated IP address and StreamScorePro start on Pro at $89.95 a month.
• Core has one volume step, 40,000 emails; heavier senders move to Pro, which has steps up to 800,000, or to Enterprise.
• Spotlight Analytics is only open to Enterprise-level SocketLabs Email senders at this time, according to its FAQ.

MailerQ

Management console

A web console shows delivery attempts, queues, error logs and statistics per IP, target domain or tag, and lets you change deliverability settings.

Throttling and flood patterns

Sets delivery rates for each source IP and target domain, and slows or pauses sending when a receiving server answers with rate-limit messages.

IP warm-up schedules

Throttle schedules define the sending rate to use on each day for a new IP address.

Bounce and feedback processing

Response patterns classify bounces, process feedback loops and trigger follow-up actions such as retrying or failing a delivery.

Email authentication

Supports DKIM, SPF, DMARC, TLS and ARC, according to the vendor.

REST API and injection methods

Messages can be injected in five ways, including AMQP, and a REST API can pause or cancel selected deliveries.

SocketLabs

SMTP relay and injection API

Mail can be sent through a standard SMTP connection or the HTTP injection API, with a separate SocketLabs API and event webhooks.

StreamScore reputation score

A color-coded score built from more than 35 internal and external data points. Core gets StreamScoreLite, and Pro gets StreamScorePro.

Subaccounts and IP pools

Subaccounts split mail streams by sender or customer, and IP pool management is listed in the feature table, for teams that route mail by policy.

Rule Engine routing

On Enterprise, the Rule Engine can send mail directly, relay it, or split traffic across several third-party providers.

Spotlight email analytics

A separate analytics product that takes webhook data from SendGrid, Mailgun or Bird and reports on sending activity, with a 30-day proof of concept.

MailerQ

• Regular€10,000

  one-time fee per instance

  Perpetual license: 100K emails per hour, 10 domains, management console. Updates and support cost €2,000 a year.

• Enterprise€25,000

  one-time fee per instance

  Perpetual license: unlimited emails per hour and domains, management console. Updates and support cost €5,000 a year.

SocketLabs

• Core$39.95

  per month for 40,000 emails, billed monthly

  First month free. SMTP relay and API, StreamScoreLite, 10 days of insight history, ticket and chat support. Extra emails $0.0013 each.

• Pro$89.95

  per month for 100,000 emails, billed monthly

  Adds a dedicated IP address, StreamScorePro and priority support. Price rises with volume: $170 at 200,000, $600 at 800,000 emails a month.

• EnterpriseCustom

  For senders of 1M+ emails a month, with optional Spotlight, StreamMonitor and Rule Engine and dedicated support.

MailerQ

No public discounts listed.

SocketLabs

• Other savings

  First month of Core free

  A new verified account gets the Core plan for one month, or a set amount of credits, without a card. Sending stops at the end unless you upgrade.