Relay vs Zello in 2026
Compare Relay and Zello for a crane crew: what each does, prices, jobsite setup, and how to choose.
2Dig is published by the makers of OperatorLink, which is compared here alongside other tools.
Compare Relay and Zello for a crane crew: what each does, its published prices, setup on a jobsite, and how to choose between them.
Relay's pages, as cited on this page, describe a service that runs on 4G/5G and WiFi, with patents and workplace safety features such as panic alerts and location visibility [1] [2] [1]. Zello's pages describe a per-user monthly price, an on-premise deployment option and a free trial [3] [4] [3]. Which one fits depends on whether the crew needs cellular and WiFi coverage, safety features, or an on-premise server.
| Option | Own fee | Card fee | |---|---|---| | Relay | not published | not published | | Zello | $8.00 per user per month, or $6.80 with an annual subscription [3] | not published | | OperatorLink | Free to use; no paid plan is built yet [5] | not published |
| Option | Own fee | Card fee |
|---|---|---|
| Relay | not published | not published |
| Zello | $8.00 per user per month, or $6.80 with an annual subscription [3] | not published |
| OperatorLink | Free to use; no paid plan is built yet [5] | not published |
The short answer
A crane crew member needs to reach the whole crew while the crane moves, and to get messages out fast. Relay's pages describe a service carried over 4G/5G and WiFi, with patents and workplace safety features such as panic alerts and location visibility [1] [2] [1]. Zello's pages describe a per-user monthly price, an on-premise deployment option and a free trial [3] [4] [3]. OperatorLink shows STOP, HOLD and SLOW to the jobsite crew and passes button presses, chat and voice between phones in a browser [5]. Relay's cited facts say nothing about signals on a jobsite, so a crew with that need should check it directly with Relay.
What Relay, Zello is built for
The facts gathered for this page describe three things about Relay and three about Zello, all taken from their own pages. Relay has 100+ patents across voice, connectivity, geolocation, translation and more [2]. Relay offers workplace safety features including panic alerts, location visibility and emergency escalation options [1]. Relay devices can use 4G/5G and WiFi connectivity [1]. Zello Work is $8.00 per user per month, or $6.80 with an annual subscription [3]. Zello Enterprise Server deploys on-premise [4]. Zello offers a free 14-day trial with no credit card required [3]. These facts do not describe how either tool handles signals, stops or voice on a jobsite, so this page does not say what they do for those jobs. A crew that wants Relay's safety features or Zello's on-premise server should check how each works before relying on it.
What OperatorLink is built for
OperatorLink is made by the team that publishes this site. For a crane crew member, it shows STOP, HOLD and SLOW to the jobsite crew, and passes button presses, chat and voice between phones in a browser [5]. A STOP releases every held direction on every phone and shows a full-screen alert to everyone else [5]. HOLD and SLOW stay on for everyone in the jobsite and are cleared when the last person leaves [5]. Holding a move button keeps sending that move to the other phones, and if the move stops arriving for 2 seconds, the other phones drop it [5]. One-tap messages such as Go Ahead, Copy That and All Clear are sent as chat [5]. Anyone who joins can take part in a voice call run from the phone browser [5].
Pricing and fees
Relay's pages, as cited on this page, give no price, so a Relay fee is not published here. Zello Work is $8.00 per user per month, or $6.80 with an annual subscription [3]. Zello offers a free 14-day trial with no credit card required [3]. The card fee is not published for any option, so a crew that expects to pay a card fee should ask each provider for it before choosing. OperatorLink is currently free to use, and no paid plan is built yet [5].
Setting it up on a jobsite
OperatorLink runs in a phone browser with no app install [5]. The person who starts a jobsite shares a link or QR code, and the crew joins from it [5]. Phones can add the app to their home screen as a standalone app [5]. A jobsite link stops working 12 hours after the first person joins [5], and a jobsite with nobody in it is wiped after 3 idle hours [5]. Button presses, chat and voice pass between phones in the browser [5]. For Relay, the facts here say devices can use 4G/5G and WiFi connectivity [1], but they do not describe how a crew joins or how signals pass on a jobsite, so the crew should confirm the rest with Relay before a shift. For Zello, the facts say Enterprise Server deploys on-premise [4], but not how a jobsite is started, so the crew should ask Zello directly.
Things to check before you choose
Does the crew need a device that stays online across the site, and what coverage does your site give for 4G/5G and WiFi? Relay's facts say its devices use those connections [1]. Does the crew need safety features such as panic alerts and location visibility, and how would each be used on a lift? Relay's page describes those features [1]. Does the crew need hosting on its own server? Zello Enterprise Server deploys on-premise [4]. Zello Work $8.00 per user per month, or $6.80 with annual subscription [3]. Which signals does the crew need on a jobsite, and how will each tool handle those signals?
How to choose
If the crew connects over cellular and WiFi, Relay's facts describe 4G/5G and WiFi connectivity [1]. If the crew wants safety features such as panic alerts and location visibility, Relay's page describes those [1]. If the crew wants an on-premise server, Zello Enterprise Server deploys that way [4]. If the crew wants to try Zello first, it offers a free 14-day trial with no credit card [3], and its Work plan is $8.00 per user per month [3]. If the crew needs a stop that reaches every phone, OperatorLink's STOP releases every held direction and shows a full-screen alert [5]. If the crew needs a free start, OperatorLink is currently free to use [5]. A crew that needs both signal handling and Relay's or Zello's features should check each option against both needs, because no single source here covers both.
Frequently asked questions
Is OperatorLink free to use?
OperatorLink is currently free to use, and no paid plan is built yet [5]. The sources cited on this page give no price beyond that. The card fee is not published for any option, so a crew that expects to pay one should check before choosing. Prices can change, so confirm the current terms with the product before a shift.
How much does Zello Work cost?
Zello Work is $8.00 per user per month, or $6.80 with an annual subscription [3]. Zello also offers a free 14-day trial with no credit card required [3]. The cited Zello facts give no price for the Enterprise Server, so that fee is not published here. Check Zello's pricing directly before choosing a paid option for a crew.
What does Relay's page say about its coverage?
Relay's page says Relay devices can use 4G/5G and WiFi connectivity [1]. The same page describes workplace safety features such as panic alerts, location visibility and emergency escalation options [1]. The cited Relay facts give no price, so check the fee directly with Relay before choosing.
Can Zello deploy on its own server?
Zello's page says Zello Enterprise Server deploys on-premise [4]. The cited Zello facts give no price for that server, so that fee is not published here. The same facts give a price only for Zello Work at $8.00 per user per month [3]. A crew that needs on-premise hosting should check the Enterprise terms directly with Zello.
How long is Zello's free trial?
Zello's page says the service is free for 14 days with no credit card required [3]. After that trial, Zello Work costs $8.00 per user per month, or $6.80 with an annual subscription [3]. A crew that wants to keep using Zello after the trial should confirm the current price before the trial ends.
OperatorLink is currently free to use, and no paid plan is built yet. [5]
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