Updated after the STACKED relaunch
Most write-ups of this pair still call Dux-Soup a Chrome extension. That stopped being true in 2026. Dux-Soup now ships as STACKED, a desktop app you can run on your own computer or have hosted for you, and the old extensions have been deprecated. So this is no longer browser against cloud. It is a tool shaped around one person and their account, against a platform shaped around many accounts working as one.
Go with Dux-Soup, in its STACKED form, if you are one seller or a small team and you want software from a company that has done this since 2015, with the option of keeping the LinkedIn session on your own machine for a lower price. Go with HeyReach if replies from many accounts need to land in one inbox, if campaigns should rotate across senders without manual work, or if you resell outreach under your own brand. Both exist to send invites and messages to people who have not heard from you before.
Common ground first. Both automate the same LinkedIn actions: visiting profiles, sending connection requests and following up with messages. Both offer a way to run without your laptop, HeyReach on every plan and Dux-Soup on its cloud version. Both have added an MCP integration so an AI assistant can work with campaigns. And both operate inside LinkedIn’s own limits, which no tool can raise.
Read the Dux-Soup column as the current STACKED app. Where its pricing page is silent on something, the table says so instead of guessing.
| Point of comparison | HeyReach | Dux-Soup |
|---|---|---|
| Form | Web app | Desktop app (Mac, Windows); extensions deprecated |
| Where campaigns run | HeyReach servers | Your computer (local) or hosted (cloud) |
| Needs your machine on | No | Local: yes. Cloud: no |
| Many accounts in one campaign | Yes, automatic rotation | Shared team campaigns from two seats |
| One inbox across accounts | Yes | Not highlighted on the plan page |
| White-label | Agency and Unlimited plans | Not highlighted on the plan page |
| Listed integrations | HubSpot, Clay, Instantly, Smartlead, Zapier, Make, n8n | Salesforce, Pipedrive, HubSpot, Slack, Zapier, Make |
| API or MCP | API, webhooks, MCP | MCP integration |
| How you pay | Per sender, or flat fee per block | Per seat; local cheaper than cloud |
| In this business since | A newer entrant | 2015 |
| Fits best at | Five senders and up | One to a few accounts |
Drawn from what each vendor publishes about its own product. Plans, limits and tiers move often, so confirm anything that matters to your decision on the vendor’s site.
The two products answer different questions. One asks how many accounts you can coordinate. The other asks where you want the automation to live.
Cloud outreach built so that many LinkedIn accounts behave like one sender.
Suits: Agencies and sales teams coordinating five or more accounts from a browser tab.
Upload one list and HeyReach shares the sending across every account you have connected. The volume each profile carries stays modest while the campaign as a whole moves quickly. Dux-Soup supports shared team campaigns from two seats, but pooling dozens of senders is HeyReach’s home ground.
One inbox shows conversations from all connected accounts. For an agency answering on behalf of clients, that removes the daily round of logging in and out of profiles.
On the Agency and Unlimited plans you can brand the app as your own and keep each client in a separate workspace. If outreach is a service you sell, this is the part that makes HeyReach feel like your product.
HeyReach is a web app and every plan runs on its servers. STACKED offers a hosted version too, but its cheaper local version needs your computer switched on and not asleep while campaigns are scheduled.
An API, webhooks, an MCP server and listed connections to HubSpot, Clay, Instantly, Smartlead, Zapier, Make and n8n make it straightforward to slot HeyReach into a larger outbound system.
A LinkedIn automation veteran, relaunched in 2026 as the STACKED desktop app.
Suits: Individual sellers and small teams who want a proven tool and a say in where it runs.
STACKED local works in the background on your own Mac or Windows machine, on your own network. STACKED cloud runs the same campaigns on Dux-Soup’s infrastructure so nothing depends on your laptop. HeyReach gives you the hosted model only.
Dux-Soup started in 2015 and has adapted to every change LinkedIn has made since. STACKED is described by the company as built on that experience. For a cautious buyer, a long track record is worth something a newer entrant cannot offer yet.
The local version costs less per seat than HeyReach’s per-sender plan at the time of writing. If one account is all you run and your computer is on during working hours anyway, that is the cheapest route between these two.
The STACKED plan page lists native integrations including Salesforce, Pipedrive, HubSpot and Slack, with Zapier and Make for the rest. Sellers who live in a CRM can push activity there without building anything.
The relaunch brought a refreshed interface, AI help with message personalization, an MCP integration and seat-based pricing for teams. People who found the old extension fiddly are looking at a different product now.
Dux-Soup’s STACKED comes in two versions. Local runs on your own computer and is the cheaper one. Cloud is hosted for you and costs noticeably more. Both are sold per seat, with a discount for paying yearly, and team seat counts are chosen at checkout. HeyReach charges per sender on its Growth plan, at a price that falls between the two STACKED versions at the time of writing, then switches to flat monthly fees that cover a block of senders for agencies. So for one account, STACKED local is the least expensive. For a hosted single account, the two are in the same range. Once you are filling a block of senders, HeyReach’s flat plans bring the cost per account down in a way seat pricing does not. Dux-Soup’s old low-cost extension tiers are gone, so discard any price you remember from before 2026 and check both sites.
Growth plan charged per sender. Agency and Unlimited plans are flat monthly fees that cover a block of senders. 14-day trial on the standard plans.
Sold as STACKED in two versions, per seat: local (runs on your computer, lower price) and cloud (hosted, higher price). Discount for paying yearly.
Three situations. Most readers will recognize themselves in one of them.
You coordinate many LinkedIn accounts and want them to share one campaign. Replies must reach a team inbox, not ten separate profiles. You run outreach for clients and need your own branding on the app. An engineer or ops lead will connect it to Clay, a CRM or an email sender through the API.
You sell from your own account, perhaps with one or two colleagues. You would rather keep the session on your own machine and pay less, or you want the choice between local and hosted later. A long track record matters to you. Your CRM is Salesforce, Pipedrive or HubSpot and you want it connected on day one.
The delivery is not what is failing. People do not accept or reply because your name means nothing to them yet. Icebreakly does no sending at all. It comments on the posts of leads you pick, in your voice, so they know you before any invite arrives. Keep a sequencer for the sending if you need one.
Cloud or desktop, pooled or solo, both tools end at the same moment: a request from someone the prospect cannot place. LinkedIn allows roughly a hundred invites a week per account, so each one spent on a stranger is expensive.
Icebreakly is built for the weeks before that request. Give it the profile URLs of the people you want. It checks each lead every day and writes a comment on their latest post in your Voice, a profile trained on your tone, usual length, sample comments and guardrails. In Approval mode the draft waits for your yes. In Autopilot it posts at a human pace. Every lead carries a touch count and a stage, and a list shows who has passed twelve touches and is ready for you to reach out.
It is not a third sequencer. Icebreakly has no connection requests, no direct messages and no shared inbox, and it will not find leads. If automated sending is what you are shopping for, HeyReach or Dux-Soup is the right category. Some teams run a sequencer and Icebreakly together, so invites go to people who have already seen the sender’s name a dozen times.
| Does it… | Icebreakly |
|---|---|
| Sends invites or messages | No |
| Rotates senders or pools replies | No. Nothing is sent |
| Native CRM integration | No |
| Where it runs | Cloud browser sessions; no install |
| Monitors your chosen leads’ posts | Yes. Daily check; comments on the latest post up to a week old |
| You approve before posting | Yes in Approval mode |
| MCP server for Claude and other clients | Yes, 63 tools |
No. In 2026 Dux-Soup moved from a Chrome extension to a desktop application called STACKED, and the company states that the earlier Pro, Turbo and Cloud extensions are deprecated. STACKED can run locally on your computer or in the cloud. Articles that compare HeyReach with a browser extension describe a product that is no longer sold.
Only the cloud version does. STACKED local uses your computer’s resources, so the machine has to stay on and awake while activity is scheduled. STACKED cloud runs on Dux-Soup’s infrastructure and continues regardless of your laptop. HeyReach is hosted on every plan.
For a single account, the local version of STACKED is the cheapest of the options at the time of writing. The hosted STACKED version and HeyReach’s per-sender plan are in a similar range. With many accounts, HeyReach’s flat agency plans lower the cost per account as you fill them. Prices change, so confirm on both vendors’ sites.
There is no solid evidence either way. A local app uses your own device and network, which some people prefer. A cloud tool keeps a steady session without depending on your laptop. LinkedIn’s terms do not allow third-party automation in either form. What you ask the account to do, and how fast, has more effect on risk than where the software sits.
Yes, within limits. STACKED is sold with multi-seat options for teams and agencies and supports shared team campaigns once you have two or more seats. HeyReach goes further on this specific point: automatic rotation across all senders, a single inbox for every account, and client workspaces with white-label branding on its agency plans.
It depends on the CRM. Dux-Soup’s STACKED lists native integrations with Salesforce, Pipedrive and HubSpot, plus Zapier and Make. HeyReach lists HubSpot and tools such as Clay, Instantly and Smartlead, along with Zapier, Make, n8n, webhooks and an API. A Salesforce or Pipedrive team may find Dux-Soup quicker to set up. A team building custom workflows gets more from HeyReach’s API.
Dux-Soup’s launch newsletter says existing Dux-Soup users can start using STACKED at no extra cost. Its support site still carries articles for the legacy Pro plan, so if you were on an older tier, contact their support for the options that apply to you.
Both have added an MCP integration. HeyReach describes its MCP server as a way for AI agents to split lead lists, create campaigns with custom messages and tag replies. Dux-Soup announced MCP support as part of the STACKED relaunch, along with AI help for personalizing messages. If an assistant-driven workflow matters to you, test the specific actions you need in each.
HeyReach has nothing to install. You sign in to a web app and connect your LinkedIn accounts. STACKED is a desktop app for Mac and Windows, so the local version involves an install and a computer that stays on, while the cloud version can be started from anywhere. For one account either takes minutes. For twenty accounts, HeyReach’s shared campaigns remove the most setup work.
That is not their main job. Both focus on delivering connection requests and messages. HeyReach can add a profile view, a follow or a post like ahead of the invite, which is a small nudge. For sustained familiarity, a comment-led tool such as Icebreakly is closer to the task: it watches the leads you choose and comments on each new post in your voice. Icebreakly does not send invites or messages, so it complements a sequencer and does not replace one.
A sequencer decides how your message is delivered. Icebreakly works on whether the person receiving it knows your name. Add a handful of leads, approve the comments it drafts on their new posts, and watch the touch count climb for a week.
