Swarmhit vs Linked API

Comparison data last verified on 5 October 2026.

3 reasons to choose Swarmhit over Linked API

What does Swarmhit do differently?

If the goal is a LinkedIn outreach feature that works and keeps your users’ accounts safe, Swarmhit gets you there without writing the campaign layer: less a Linked API replacement than the layer you were otherwise going to build on top of it.

When raw actions stop being enough

Nobody leaves Linked API because the docs are bad; they are among the best in the category. Teams go looking when they price what sits above the actions: a queue that spreads leads across days, follow-ups that stop on a reply, an inbox the team can work from, and the judgment to set limits on someone else’s accounts. The second trigger is the fleet: a published seat price that never steps down, with volume discounts only on request.

The comparison is also apples to oranges, and it is worth being honest about. Linked API is a raw actions API; Swarmhit is a Smart API with the outreach engine built in. Decide first which one you are shopping for: actions to build on, or outcomes your product can call.

What does Linked API actually give you?

Linked API, operated by the Estonian company What the Flutter OÜ, runs every connected LinkedIn account in its own cloud browser with a stable residential IP from the account’s region, a matched device fingerprint and humanized input. Its 50+ actions cover messaging and connection requests, people, company and job searches, profile and company data, posting with media, reactions and comments, Social Selling Index and analytics, and, on the Plus plan, Sales Navigator search, InMail and Sales Navigator inbox sync. Credential handling is cleaner than most of the category: its safety page says it never sees or stores your password, which you enter yourself in a browser session only you can access. The developer surface is strong: two-header auth, a uniform response envelope, observable queues with position and ETA, Node.js and Python SDKs, a CLI, an open-source MCP server, and hosted connection sessions so a SaaS can onboard its customers’ accounts.

Where does the risk sit?

The engineering and the contract point in opposite directions, and you should read both. The engineering is the current state of the art for making automation look like a person. The terms of use then state that the company is not liable for any LinkedIn decision to restrict, block, disable or terminate your account, and, in their words, “using Linked API does not exempt you from LinkedIn’s enforcement actions.” Payments are non-refundable and disputes go to Harju County Court in Tallinn. The contract leaves the restriction risk with you, and caps what you can recover at three months of fees.

Swarmhit runs every action on a LinkedIn account your customer owns and has connected, on a dedicated proxy, under per-sender limits we enforce and 250+ safeguards we monitor around the clock. No LinkedIn automation is risk-free, but in campaigns the pacing judgment is ours to operate, and per-sender caps hold on every send.

How do the API docs compare?

Linked API’s documentation reads well. Each of its 62 actions has its own page with parameters and a response example, and most list the errors it can return; the SDK pages show Node.js and Python side by side, and every page is also served as markdown for coding agents. The webhook toolkit is strong: a delivery log, replay that reuses the event id, a test event and documented backoff. The docs are candid about failure modes too, from parked workflows to partial cancellation and when not to retry.

What is missing is the layer your tooling reads. There is no OpenAPI file and no Postman collection: every action runs through one POST /workflows endpoint that takes a JSON workflow, so there is no spec to generate a typed client or a contract test from. That endpoint takes no idempotency key, and cancelling a workflow does not undo the actions it already completed, so a send that timed out cannot be retried safely. No webhook signature is documented, so your endpoint cannot prove a delivery came from Linked API. The main API’s throttle error carries no limit or reset time to back off against, and typed parameter tables and curl examples appear only on the Admin API pages.

Swarmhit publishes a current OpenAPI 3.1 file, version 1.7.0, with 133 operations and 107 schemas behind 13 guides. Campaign sends are paced and retried by the platform, and the sends your code triggers, such as inbox replies and direct actions, accept an Idempotency-Key, so a retry replays the first response instead of sending again. A sender-limit 429 tells your code the limit, how much of it is used, the window and, for daily and weekly caps, when it resets. Every webhook delivery is signed, logged and replayable. The full reference is at developer.swarmhit.com.

What are you signing up to build on raw actions?

Competitor pricing and product facts on this page were checked against Linked API’s own pricing page, documentation, safety page and terms of use on 1 and 5 October 2026. Vendors change prices without notice, so treat anything older than a month as indicative.

What does each option cost?

Linked API bills per seat, one seat per connected LinkedIn account: $49 a month on annual billing or $69 monthly for Core, $74 or $99 for Plus with Sales Navigator, with unlimited workflow execution and a 7-day trial on a first one-seat checkout, payment method required. The published seat price is the same for the first account and the five hundredth; volume discounts are offered only on request.

Swarmhit’s pricing is public: $16.90 per connected LinkedIn sender a month for the first 50, decreasing band by band down to $6.90 between 1,501 and 2,500 senders, and cold email (in beta) from $59 a month for 50,000 sends. Each band of senders is priced at its own rate, so adding senders lowers what the next ones cost rather than repricing the fleet you already have. Above 2,500 senders, pricing is set with our team.

The price buys the work itself: Swarmhit absorbs LinkedIn’s changes behind 250+ monitored safeguards and ships the campaign logic, so you build on a working foundation instead of rediscovering it with your customers’ accounts at risk. See the integration models or book the call.