In short
An enterprise social network is defined by visible, shared conversation, and it earns its place by how many employees it informs, not how many post. We unpack the 2013 academic definition, what is still standing in 2026, and what Tryane's Viva Engage Benchmark 2026 says about who actually reads.
Key takeaways
- The 2013 academic definition rests on four traits: messaging coworkers, broadcasting to all, shared editable content, and visible communication.
- Visible conversation sets an ESN apart: employees see posts not addressed to them, which email and chat never show.
- Yammer lives on as Viva Engage in Microsoft 365, while Workplace from Meta closed as of May 2026.
- In Tryane's Viva Engage Benchmark 2026, readers were the largest user group in every size band, and their share shrank as organisations grew.
- Most users read without reacting or contributing, so reach, not posting volume, is the honest KPI for your network.
What counts as an enterprise social network?
You have probably heard the term enterprise social network, or ESN, used loosely for anything from a Slack workspace to a company Facebook group. The definition that researchers and practitioners still rely on is stricter, and it is worth getting right before you judge whether your own network is working. In their 2013 definition, Leonardi, Huysman and Steinfield describe enterprise social media as web-based platforms that allow employees to communicate messages with coworkers or broadcast messages to everyone in the organisation, post and edit text and files shared by themselves or others, and view the posts and communication by others online[1].
Strip the academic wording and you get a four-trait checklist you can apply to any tool on your channel list:
- Messaging: employees can send messages to individual coworkers or broadcast to the whole organisation.
- Shared content: anyone can post text and files, and others can edit what has been shared.
- Visible activity: employees can view the posts and conversations of other people online, not only what lands in their own inbox.
- Web-based: the platform lives in the browser or an app, open to everyone the organisation enrols.
Map those traits onto Viva Engage and the definition stops feeling academic. Communities and the storyline carry the messaging and broadcasting. Posts with attachments and editable threads cover shared content. And the newsfeed, where you scroll through conversations between colleagues you have never met, is the visible-activity trait in action.
The definition also tells you the category is established, not experimental. The same paper cites a Eurostat survey showing that about 27% of enterprises in the European Union had already implemented social media for employees[1]. When you can name what makes a platform an ESN, you can also name what makes it valuable, which is where it differs from the channels you already run.
How is it different from email and chat?
Email and chat are the workhorses of internal communication, so the honest question is what an ESN adds. The differentiator is visibility. Enterprise social media let employees view the posts and communication of others online, not only the messages sent to them, as Leonardi and colleagues observed in the definition above[1]. On an email thread or a Teams chat, you see the conversation only if someone added you to it. On an ESN, the conversation is observable by default.
- Email: private and point-to-point. If you are not on the thread, the exchange does not exist for you.
- Chat: private by default, and scoped to a team or a project. Useful for operations, invisible to the wider organisation.
- Enterprise social network: open by default. An employee can absorb a discussion between two colleagues in another country without posting a word.
That third row is the strategic point. Because conversations are visible, employees absorb information they were never directly sent: they pick up context, see how leaders answer questions, and learn what other departments are working on. The value of the channel therefore accumulates in its audience, not in its contributors. We see this regularly in the engagement and reach data of internal communication campaigns: the people who never react still read, and they still take the message away.
Draw the conclusion for your channel mix from that. Email tells you who opened a message you sent them. An ESN tells you who spent time on a conversation that was open to everyone. When you judge the channel by posts and comments alone, you measure the smallest part of what it does.
Which enterprise social networks are still standing?
The ESN category has consolidated sharply, and if you are consolidating channels yourself, the map matters. Yammer, launched in 2008 and acquired by Microsoft in 2012, lives on inside Microsoft 365 as Viva Engage. Microsoft positions it as part of the Viva employee experience platform built within Microsoft 365 and Teams, a place where people connect with leaders, coworkers and communities[2].
- Yammer pioneered the standalone ESN and joined Microsoft in 2012, later becoming part of Microsoft 365 and Teams as Viva Engage.
- Workplace from Meta launched in 2016 and grew into one of the category's most visible platforms.
- Meta announced Workplace's shutdown in May 2024 and pointed customers toward migration options[3].
- Workplace went read-only on 1 September 2025 and closed as of May 2026[3][4].
What is left is a market that has consolidated around the Microsoft 365 estate. For organisations already running Teams, SharePoint and Viva Connections, Viva Engage is the ESN that arrives with the licence rather than against it, and the practical differences between it and Teams for company-wide communication are worth being clear about before you allocate effort; our Teams vs Viva Engage comparison covers them in detail.
The Workplace exit is a caution for anyone consolidating channels. If your organisation is migrating away from it, the closure removes a whole category of historical engagement data along with the platform, which makes it harder to prove what your communication achieved. Whatever platform you settle on, start measuring who it informs from day one, because the channel you can measure is the channel you can defend at budget time.
How many people read an enterprise social network?
If reach is the value, the next question is how much reach a typical ESN actually delivers. Tryane's Viva Engage Benchmark 2026 answers this with data from more than 3.5 million Viva Engage users across customer networks. The report groups users by behaviour, and in every segment the largest group is the readers, people who view posts without reacting or contributing. In other words, most people on your network are reading, not posting.
Reader shares vary more with company size than you might expect. Here is how the six size bands compare in the benchmark:
| Organisation size | Readers (share of users) | Likers | Contributors |
|---|---|---|---|
| Fewer than 2,500 employees | 49% | 22.4% | 10.2% |
| 2,500 to 5,000 employees | 61% | 11.1% | 4.1% |
| 5,000 to 10,000 employees | 52% | 10.8% | 6.7% |
| 10,000 to 25,000 employees | 58% | 6.1% | 3.3% |
| 25,000 to 50,000 employees | 55% | 4.8% | 2.4% |
| More than 50,000 employees | 43% | 6.3% | 5.2% |
All figures in this table come from Tryane's Viva Engage Benchmark 2026.
The spread runs from 49% of users reading in organisations with fewer than 2,500 employees down to 43% in organisations with more than 50,000, the lowest readers share of the six size bands. Size works against you: the larger the organisation, the smaller the share of employees the network informs, which is exactly when leadership scrutiny of the channel is highest. Place your own organisation in a band and you have an honest baseline for what good looks like at your scale.
Download the full Viva Engage Benchmark 2026 to compare your network by industry and company size.
How do you measure who your network informs?
Native Viva Engage reporting gives you a starting point, and it is worth knowing exactly what it shows. The built-in dashboards count posters, likers and readers in aggregate: how many people are active, how many reactions a community earned, how many members a network has. That tells you activity happened. It does not tell you who was informed, because the moment you ask which departments, which countries or which leadership audiences actually read your posts, aggregate counts stop answering.
- What native reporting shows: aggregate counts of active users, reactions and community membership across the network.
- What it cannot show: which readers belong to which department, country or audience segment, and how that changes over time.
- What network analytics adds: reader tracking by department and country over time, so you can see which audiences your posts actually reach and which ones they miss.
The distinction matters because the platform itself is designed for connection at scale. Microsoft positions Viva Engage as a place where people connect with leaders, coworkers and communities across the organisation[2], which means the audiences flowing through it are exactly the segments you are asked to report on. Measurement that stops at aggregate counts leaves that segmentation work undone.
Connect the measurement to action and it earns its place in your reporting. When you can see readers by department and country over time, you can segment your audiences precisely, adapt your follow-up where a message did not land, and prove reach to leadership with data rather than vanity metrics. The four measurement questions, distribution, reach, engagement and outcome, give you a structure for that analysis; our guide on what to measure and where to start works through each one.
See who your Viva Engage network actually informs
Analytics for Viva Engage is a dedicated analytics platform for Viva Engage, formerly Yammer, built to monitor conversations, identify the content that engages, and benchmark your network's performance, including who reads it rather than just who posts. It turns the reader shares, segments and trends we have discussed into a view of your own network, by department and country, so you can adapt your strategy and prove reach with data.
If you want that reader-level view applied to your own Viva Engage network, book a 30-minute call with Jérémy to see how Analytics for Viva Engage breaks your audiences down by department and country, and where your follow-up should land next.
Frequently asked questions
What is an enterprise social network?
It is a web-based, company-internal platform where employees can message coworkers or broadcast to the whole organisation, post and edit shared text and files, and view the posts and communication of others online. That four-part definition comes from researchers Leonardi, Huysman and Steinfield in 2013 and still fits tools like Viva Engage today.
Is Viva Engage an enterprise social network?
Yes. Viva Engage is the enterprise social network of the Microsoft 365 estate, formerly known as Yammer. Microsoft positions it as part of the Viva employee experience platform built within Microsoft 365 and Teams, a place where people connect with leaders, coworkers and communities.
Is Workplace from Meta still available?
No. Workplace from Meta went into read-only mode on 1 September 2025 and closed as of May 2026, with the shutdown announced back in May 2024. Organisations that relied on it have had to migrate their internal conversations elsewhere, which has consolidated the category further around Microsoft 365.
How is an enterprise social network different from email or chat?
Email and chat are private: you only see the messages sent directly to you. An enterprise social network makes conversation visible, so employees can view the posts and communication of others online, not only messages addressed to them. That visibility is what turns the platform into a reach channel: people are informed even when they never reply.
What percentage of employees actually read an enterprise social network?
In Tryane's Viva Engage Benchmark 2026, covering more than 3.5 million Viva Engage users, readers were 49% of users in organisations with fewer than 2,500 employees and 43% in organisations with more than 50,000, the lowest of the six size bands. Reader share therefore varies with company size, and most users read without reacting or contributing.
Do most employees post on enterprise social networks?
No. Passive consumption dominates every segment of the benchmark: a majority of users read content without reacting or contributing, and contributor shares stay in the single digits in every size band. That is why judging the network by posting volume understates its real reach.
How do you measure who your enterprise social network informs?
Native Viva Engage reporting counts posters, likers and readers in aggregate, which tells you activity happened but not who was informed. Network analytics adds the missing layer: tracking readers by department and country over time, so you can see which audiences your posts actually reach, segment accordingly, and prove that reach to leadership.
Sources
Further reading
• How to create relevant Viva Engage communities?
• The 90-9-1 rule: how many Viva Engage users really post?
• Yammer is now Viva Engage: what changed for your network
• Viva Engage adoption by industry: 2026 benchmark figures
If you want to see what cross-channel reporting looks like against your real data, Tryane runs a 15-minute walkthrough with no slides. Book a slot with Jérémy.