Trusted by B2B sales teams across 14 countries

Email outreach that lands and converts.

CloudJet is an email outreach and infrastructure platform for B2B teams.

Campaigns, sequences, mailboxes, enrichment, and deliverability run in one system—not five stitched tools.

  • Campaigns & sequences
  • Unified mailboxes
  • Deliverability built in
  • Data enrichment
  • Responsible sending only
47M+Emails sent last month
99.97%Platform uptime
~90 secAvg. onboarding time

Inbox placement

0%

Bounce

0.38%

Complaints

0.02%

What is CloudJet?

One platform for outbound and product email—not a stitched stack of relays, sequencers, and CRM tools.

CloudJet is an email infrastructure and deliverability platform for teams that send commercial mail at scale.

Dedicated infrastructure means your sending lanes are isolated from strangers. Domain automation, mailboxes, campaigns, replies, CRM, and deliverability checks operate in the same system.

Core capabilities

Dedicated sending lanes and workload isolation
Automated domain verification (SPF, DKIM, DMARC)
Mailboxes with a unified inbox for replies
Multi-step campaigns and sequences
CRM and data enrichment for permission-based outreach
Pre-send protection and deliverability monitoring
REST API and SMTP sending

Domain and DNS automation

Dedicated infrastructure only works when authentication is aligned. CloudJet walks domains from ownership through SPF, DKIM, and DMARC so mailbox providers can attribute mail to the right sender.

  1. 1Add and verify the domains you send from
  2. 2Publish SPF, DKIM, and DMARC so providers can attribute mail
  3. 3Route outbound, transactional, and sensitive streams separately
  4. 4Watch authentication health as DNS records change

Domain health

outreach.acme.io

Passing
  • SPF

    v=spf1 include:_spf.cloudjet…

    PASS
  • DKIM

    selector1 · RSA-2048

    PASS
  • DMARC

    p=reject · aligned

    PASS

Alignment · SPF, DKIM, and DMARC in sync

Pre-send protection

Pre-send protection is CloudJet's guardrail layer: checks meant to stop preventable failures before mail is accepted for delivery.

  • Authentication and DNS alignment before volume ramps
  • List hygiene and verification for permission-based sending
  • Bounce and complaint signals tied to the sending lane
  • Policy guardrails that can pause abusive or misconfigured traffic

Pre-send scan

Campaign · Q4 outbound

Authentication

Aligned

List hygiene

Verified

Bounce signal

0.2%

Send policy

Within limits

Cleared to send · guardrails armed

SPF · DKIM · DMARC livePre-send guardrailsAPI + SMTP

Built for every stage of outbound

Campaigns, deliverability, and mailboxes — move your cursor over a card to see it come alive.

Campaigns

Multi-step sequences with live opens, clicks, and replies — outreach that lands and converts.

Explore

Sequence · Day 3

Outbound · acme.io

Quick intro — partnership idea

68% opens24% replies

Deliverability

Pre-send checks, spam-trap blocking, and inbox placement so your mail stays in Primary.

Explore

Inbox placement

Gmail · Primary
Outlook · Focused
Spam traps · Blocked

Mailboxes

One unified sales inbox across domains — replies, threads, and sending identity in sync.

Explore

Unified inbox

Jordan Lee

Re: Q4 pipeline

Sam Kim

Meeting confirmed

Morgan R.

Pricing question

The complete outreach suite

Campaigns, deliverability, and data—visualized. No stitched stack.

Mailboxes

One unified sales inbox

AC

alex@acme.io

2m

Re: Q4 pipeline review

2
JL

jordan@cloudjet.uk

14m

Meeting confirmed for Thu

MK

maya@startup.io

1h

Follow-up on demo

1
SR

sam@retail.co

3h

Pricing question

Unified inbox

5
AC
JL
MK
SR

All accounts in one stream

Domain reputation

Live health score ring

99

Excellent

7-day trend

Bounce rate

0.2%

Blacklist

Clear

SPF

Aligned

DKIM

Signed

DMARC

Enforced

Inbox placement

Primary inbox across every major B2B ESP — spam traps blocked

98%

Primary

Primary98%
Spam2%

Across all ESPs · 7 days

Live send protection

Traps stopped before your domain is exposed

Queued
OutboxVerifyPrimary inbox

Trap detection

Valid prospect
Spam trap
1Scan
2Verify
3Route

12 traps blocked today

B2B inbox providers

Placement by ESP

Google Workspace

Google

inbox

99%Primary
Microsoft 365

M365

inbox

98%Primary
Mimecast

Mimecast

inbox

97%Primary
Barracuda

Barracuda

inbox

96%Primary
Proofpoint

Proofpoint

inbox

98%Primary
Cisco Secure Email

Cisco

inbox

97%Primary
Hornetsecurity

Hornet

inbox

96%Primary
Sophos Email

Sophos

inbox

95%Primary

Campaigns & sequences

Multi-step outreach with live stats

Day 172% opened

Quick intro — partnership idea

412 recipients

Day 348% opened

Following up on my note

380 recipients

Day 7Sending now

Should I close the loop?

350 recipients

Reply38 replies

Meeting booked — thanks!

38 recipients

Sequence funnel

Sent → Opened → Clicked → Replied

Reply trend

In sequence

SK
JL
MR
+1.1k prospects

Data enrichment

Contacts resolve instantly

Raw import

jordan@acme.io

Enriched contact

JL

Jordan Lee

San Francisco, US

Valid email

Company

Acme Corp

Title

VP Sales

LinkedIn

linkedin.com/in/jlee

Email

jordan.lee@acme.io

Signals you can act on

Bounce trends, DNS health, and lane metrics in one operational view.

CloudJet surfaces deliverability signals where operators work: bounce rates by lane, DNS authentication health, and queue depth—so teams fix issues before reputation damage spreads.

Bounce rate by domain

DNS authentication

  • SPFPASS
  • DKIMPASS
  • DMARCPASS
  • AlignmentDRIFT

Median latency

< 180ms

Queue depth

12

Active lanes

24

Used alongside the tools your sales team already runs

CloudJet

Your mail layer

SMTPAPIMailboxes

Connects to your existing stack

Salesforce

Salesforce

CRM

HubSpot

HubSpot

Marketing

Apollo.io

Apollo.io

Outreach

Outreach

Outreach

Sales

Instantly

Instantly

Cold Email

Lemlist

Lemlist

Sequences

4.9 / 5

Avg. customer rating

< 180ms

Median delivery latency

99.97%

Uptime last 12 months

Built for real teams

Outbound, product, and compliance—same infrastructure.

Sales & outreach

  • Domain discipline per motion
  • Complaint monitoring built in
  • List quality stays clean
Explore

Transactional

  • System mail isolated
  • Receipts off campaign paths
  • Clear send boundaries
Explore

Financial & legal

  • Sensitive streams separated
  • Audit-friendly isolation
  • Compliance-ready lanes
Explore

Platforms & developers

  • API, SMTP, webhooks
  • One verification story
  • Events you can ship on
Explore

Why not shared SMTP alone?

Shared pools hide risk. Stitched stacks lose signals.

CapabilityShared SMTPStitched stackCloudJet
Workload isolationLimitedFragmentedBuilt-in
Pre-send protectionRareAdd-onNative
Warmup + DNSSeparateMultiple toolsUnified

Scale with discipline

Transparent plans—from pilot to enterprise.

Starter

£49/mo

  • Verified domains + DNS guidance
  • Mailbox provisioning
  • Onboarding guardrails
Start Sending
Most popular

Growth

£149/mo

  • Multi-domain controls
  • Operational visibility
  • Priority support
Start Sending

Enterprise

Custom

  • Dedicated onboarding review
  • High-volume design
  • Custom SLA
Contact Sales

FAQ

SMTP, deliverability, isolation, and responsible sending.

CloudJet is both. You can send through SMTP and APIs like a relay, but the product is built as a broader email infrastructure and deliverability platform: routing control, workload isolation, warmup workflows, pre-send protection, monitoring, and data-quality tooling—designed so teams do not have to stitch together four vendors for one mail program.

Teams that send real commercial email at scale: B2B sales organizations, SaaS products sending on behalf of customers, agencies managing multiple clients, developers integrating transactional mail, and operators who need governance-friendly workflows. CloudJet is not for unsolicited bulk mail or purchased lists.

Yes. Many teams start with governed shared pools and expand into dedicated lanes as volume and risk profile grow. The point is not “IP type,” but whether your routing model keeps reputation explainable and isolated from strangers.

Yes, for compliant B2B outreach with permission, relevance, and list hygiene. Outbound works best when paired with warmup discipline, pre-send checks, lead-quality workflows, and monitoring—not when mail is blasted to cold purchased lists.

Yes. Transactional mail is often business-critical, so it should be routed and monitored separately from experimental outbound. CloudJet’s model encourages isolation between use cases so one campaign does not destabilize password resets and receipts.

Warmup is a controlled ramp that builds stable sending patterns while authentication and list quality stay healthy. CloudJet supports warmup workflows aligned to your domains and lanes—but warmup is not magic: if DNS is wrong or lists are bad, ramping slowly still fails.

Pre-send protection is CloudJet’s guardrail layer: checks and policy enforcement meant to stop preventable failures before mail is accepted for delivery—misconfiguration drift, hygiene issues, and abusive patterns that damage reputation quickly.

Isolation means separating mail streams (by domain, client, or use case) so reputation signals, incidents, and policies do not silently cross-contaminate. It is how operational teams debug faster and how compliance-minded teams keep boundaries explicit.

Yes. Many teams send transactional traffic via SMTP while using APIs for provisioning, verification, operational queries, and automation—or the reverse. The goal is one platform with consistent auth, routing, and visibility.

Yes. Multi-domain architecture is central to CloudJet: verify domains, route intentionally, monitor per domain, and keep outbound and transactional mail from colliding.

Through a combination of authentication enforcement, routing isolation, monitoring, bounce/complaint handling, abuse prevention, and pre-send guardrails. Reputation is protected by operational discipline—not by promises of inbox placement.

Yes as part of a broader data-quality strategy. Verification and lead checking are meant to support permission-based sending and reduce self-inflicted deliverability damage—not to legitimize spam.

We monitor complaint and bounce signals, enforce acceptable use, and may pause or restrict sending when risk thresholds are exceeded. Purchased/scraped lists and unsolicited mail are prohibited. Serious violations can lead to suspension.

You will verify sending domains (SPF/DKIM/DMARC alignment), configure routing for your use cases, and provision mailboxes where applicable. Enterprise programs may require additional review for volume and compliance expectations.

Yes. Agencies benefit from multi-domain operations, routing control, monitoring, and clear separation between client programs—so one customer’s mistake does not become another customer’s deliverability incident.

Yes. Event visibility is part of the platform story: webhooks and operational signals help engineering teams automate retries, CRM updates, billing, and incident response instead of polling opaque dashboards.

Shared SMTP pools can hide deliverability risk because your signals mix with strangers. CloudJet emphasizes ownership, routing control, isolation, and monitoring so your mail program is explainable—what sent, from which domain, through which lane, and what changed when metrics move.

Yes. Migration is usually a staged DNS and routing cutover: verify domains, parallel-run signals, ramp thoughtfully, and monitor complaints and bounces. See our migration narrative on /switch-to-cloudjet.

No. Purchased, scraped, or rented lists are prohibited. We require permission-based sending and reserve the right to request opt-in evidence, pause sending, or suspend accounts that violate our Acceptable Use Policy.

Hard bounces should be suppressed quickly; repeated bad sending drives negative provider signals. CloudJet aligns bounce handling with monitoring so operators can correct list sourcing and configuration issues early.