APIs & SDKs
Swarmhit
LinkedIn and cold email outreach API with built-in sequencing, throttling and 250+ safeguards
A Smart API that runs complete LinkedIn and cold email campaigns in one call, with sequencing, throttling, retries and 250+ safeguards built in.
Overview
The Swarmhit homepage
Swarmhit is an outreach API that powers LinkedIn and cold email campaigns through a single API call. Unlike raw APIs that require developers to build queuing, scheduling, pacing and retries themselves, Swarmhit's Smart API handles the entire execution layer: sequencing steps across both channels, throttling per sender and mailbox, automatic retries, sender rotation, and reply synchronization. The platform includes 250+ safeguards monitored 24/7 to protect sender health and deliverability.
Developers and AI agents connect LinkedIn accounts and email mailboxes, then launch campaigns by defining a sequence of steps that can branch based on lead responses. Email and LinkedIn steps run in the same sequence, and the API returns webhooks for every event: messages sent, replies received, invitations accepted, and bounces. The unified dashboard shows account health, API usage, webhook logs and billing.
Swarmhit also offers a leads database with over 1 billion contacts across 60 million companies, updated weekly, where teams can search in plain language and enrich contacts before adding them to campaigns. For companies that prefer not to build sequencing themselves, Swarmhit provides custom engineering services and a white-label ready-made sequencer.
Capabilities
- Unified sequences combining LinkedIn and cold email steps
- Built-in sequencing, queuing, throttling and retries
- 250+ safeguards monitored 24/7
- Dedicated proxy and managed warmup per LinkedIn sender
- Leads database with 1B+ contacts across 60M companies
- Branching logic based on lead response and profile data
- Webhook events for sends, replies, accepted invitations and bounces
- Unified dashboard for accounts, mailboxes, usage and webhooks
- Unlimited mailboxes for cold email campaigns
Pricing
Pricing model: Freemium
LinkedIn: $16.90 per sender per month (1-50 senders), $14.90 (51-150), $12.90 (151-250), $10.90 (251-500), $8.90 (501-1,500), $6.90 (1,501-2,500), then sales pricing. Cold email: $59 for 50,000 sends per month, $94 for 125,000, $139 for 250,000, $199 for 500,000, $319 for 1 million, $539 for 2 milli
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Swarmhit fact sheet
| Community votes | 0 |
|---|---|
| Based in | Dubai, United Arab Emirates |
| Website | swarmhit.com |
Swarmhit metrics
Vendor metrics for swarmhit.com: Ahrefs Domain Rating and Majestic link data, with the delta since the last review.
- Domain Rating
- 26
- −1 (down) since last check
- Trust Flow
- 6
- no change since last check
- Citation Flow
- 31
- no change since last check
- Referring domains
- 75
- no change since last check
- External backlinks
- 450
- no change since last check
Vendor Domain Rating (Ahrefs) checked 6 Nov 2026, spec changed 1 Nov 2026. Vendor topic: Shopping/Publications (5). Vendor Majestic data checked 25 Oct 2026, spec changed 25 Oct 2026. Link metrics supplied by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
Swarmhit vendor domain
Open the vendor record
We read this from the registry's RDAP record on 5 Nov 2026, 13:58 UTC.
- Domain age
- 6 months
- Registered
- Expires
- Registrar
- NameCheap, Inc.
- DNSSEC
- Not signed
Swarmhit post-launch report
| Measure | At launch, then latest |
|---|---|
| Domain Rating (Ahrefs) | 28 to 26 −2 (down) since launch 25 Oct 2026, then 6 Nov 2026 |
| Trust Flow (Majestic) | 6 first measured 25 Oct 2026 |
| Referring domains (Majestic) | 75 first measured 25 Oct 2026 |
Day 11 since launch. Next receipt: day 30, 24 Nov 2026. Many things move these figures, so a change is not proof of cause. Only stored readings are shown.
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Buyer questions
What is the Swarmhit Smart API?
An outreach API that runs the whole campaign in one call, not just individual sends. One POST request sets up the sequence and senders, then you add leads. The Smart API handles queuing, sending windows, throttling, retries, sender rotation, reply sync and 250+ safeguards on LinkedIn and email.
How is a Smart API different from a raw API?
A raw API gives you one endpoint per action and leaves the loop, pacing, retries and reply tracking to your team. The Smart API ships that engine built in: your product calls POST /campaigns and gets back webhooks for messages, emails, replies, invitations and bounces.
Which channels does the Smart API cover?
LinkedIn including connection requests, messages, InMail, voice notes, post comments, likes, follows and profile visits. Cold email using Google, Microsoft and IMAP mailboxes in the same sequences as LinkedIn steps. More channels including WhatsApp and iMessage are coming soon.
How much does the Smart API cost?
Each channel has its own price. LinkedIn is billed per connected sender with no minimum, from $16.90 a month each for the first fifty and down to $6.90 at volume. Cold email is billed by monthly sends, from $59 a month for 50,000 with unlimited mailboxes. Above 2,500 senders or 5 million sends, pricing is scoped with sales.
Is LinkedIn automation safe with the Smart API?
No automation on LinkedIn is zero-risk. Every sender gets a dedicated proxy, managed warmup, per-account caps and business-hour windows behind 250+ safeguards monitored 24/7, and each sender's health and limits are readable in the API.
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- Demo video (locked)
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