List of Social Media Sites: 40+ Platforms by Category

There are now 5.66 billion social media users worldwide, roughly 70% of the global population. Choosing where to focus your business marketing means understanding what each platform actually does, who uses it, and whether it fits your goals. This list covers over 40 active social media platforms and apps, grouped by category, with current monthly active user (MAU) counts and practical business applications. ProfileTree, a Belfast-based digital agency, maintains this guide as a reference for businesses building their social media marketing strategies.

Social Media in Numbers

Before looking at individual platforms, here are the headline figures shaping social media in 2026. These numbers come from DataReportal, Statista, and platform earnings reports.

Seven platforms now exceed one billion monthly active users each: Facebook, YouTube, WhatsApp, Instagram, TikTok, WeChat, and Telegram. That is a significant shift from just five years ago, when only three platforms had crossed that mark.

For businesses developing a digital strategy, these numbers underline a simple point: your audience is already on social media. The question is which platforms they prefer and what they expect to find there.

The Full List of Social Media Sites by Category

This is the part most people come for: a full list of social media sites and apps, organised so you can scan by type rather than wading through one long alphabetical run. Each entry gives the current user count, the core audience, and what the platform is genuinely useful for in business terms.

Social Networking Platforms

These are the general-purpose platforms where people connect with friends, family, brands, and communities. They offer the broadest marketing reach.

Facebook | 3.07 billion monthly active users. Facebook remains the world’s largest social network. Despite jokes about it being “for older users”, the platform still reaches more people than any competitor. Over half of Facebook users are millennials (aged 25 to 45), and the platform accounts for roughly 59% of global social media ad spend. For businesses, Facebook Groups, Marketplace, Events, and detailed advertising tools make it one of the most versatile platforms for both local and international marketing. If your business serves customers locally in Northern Ireland or across the UK, Facebook’s location targeting is particularly strong.

Instagram | 2.3 billion monthly active users. Owned by Meta, Instagram has grown well beyond photo sharing. Reels now drive the majority of engagement, and Instagram Shopping lets businesses tag products directly in posts and stories. The platform skews younger than Facebook, with 61% of users aged 18 to 34. For businesses in retail, hospitality, food, fashion, or any visually driven sector, Instagram remains one of the highest-return platforms. It also integrates with Meta’s advertising tools, so campaigns can run across both Facebook and Instagram from a single dashboard.

LinkedIn | 1 billion+ members. LinkedIn has quietly become one of the most engaged platforms in 2026. Comments on posts are up significantly year over year, and the platform’s publishing features give businesses a direct channel for thought leadership. For B2B companies, recruiters, consultants, and professional service providers, LinkedIn is where decisions get influenced. Company pages, LinkedIn articles, and employee advocacy programmes all contribute to brand visibility. If you are offering services to other businesses, LinkedIn should be one of your two or three core platforms. It is worth getting the basics right first, including choosing the correct LinkedIn industry for your company page and learning how to use LinkedIn for business networking.

Threads | 350 million monthly active users. Meta’s text-based platform launched in July 2023 and hit 100 million sign-ups in its first week. After initial hype faded, growth steadied, and the platform now has around 350 million MAU. By early January 2026, Threads overtook X in daily mobile users. The platform connects directly to Instagram accounts, making it a natural extension for brands already active there. It works well for conversational content, quick updates, and behind-the-scenes commentary.

X (formerly Twitter) | 335 to 660 million monthly active users. User figures for X vary by source, and the platform has undergone significant changes since Elon Musk’s acquisition. Reported MAU figures range from 335 million (Buffer) to 660 million (Social Media Today). X still functions as a real-time news and conversation platform, and its Spaces feature provides live audio rooms. For businesses, X works best for customer service, industry commentary, and participating in trending conversations. If you are still finding your feet on the platform, our guides on what a Twitter handle is and how to trend on Twitter cover the fundamentals.

Bluesky | 40+ million registered users. Bluesky is a decentralised social network originally incubated inside Twitter. It launched publicly in February 2024 and grew rapidly through late 2024 and into 2025, driven partly by users leaving X. The platform now has over 40 million registered users with around 4 million daily active users. It appeals to tech-savvy creators, writers, and communities who want more control over their feeds and data. For most businesses, Bluesky is still too small for significant marketing investment, but it is worth watching.

Video and Short-Form Platforms

Video dominates social media consumption. These platforms are where most of that viewing occurs, and they are also where a business’s production demands are highest.

YouTube | 2.85 billion monthly active users. YouTube is the second-most-visited website in the world and serves as both a social platform and a search engine. Over 1 billion hours of video are watched daily. For businesses, YouTube offers long-form content opportunities that no other platform matches: tutorials, product demonstrations, interviews, case studies, and educational series. YouTube SEO is a discipline in its own right, and businesses that invest in it consistently see compounding returns over time. YouTube Shorts, the platform’s short-form video feature, now competes directly with TikTok and Instagram Reels. The challenge for most SMEs is not strategy but capacity, which is where planned video marketing earns its place.

TikTok | 1.6 to 2 billion monthly active users. TikTok’s growth has been extraordinary. The platform’s algorithm-driven content discovery means that even accounts with zero followers can reach millions of viewers if the content resonates. Average daily usage exceeds 55 minutes per user, and the platform is increasingly used for product discovery and purchasing decisions. TikTok Shop has turned the app into a direct sales channel, and nearly half of users have made purchases through it. The format also keeps changing fast, so it helps to track the rise of short-form video rather than treating any one trend as fixed.

TikTok’s origins in lip-sync video have also fuelled a new wave of AI-powered content creation. Lip sync AI tools now let businesses produce realistic talking-head videos from a single photo or script, making multilingual video content and social media ads accessible without expensive production setups. For businesses exploring video marketing services, these tools represent a genuine shift in what is possible on a small budget, though they reward people who understand framing, pacing and brand consistency rather than treating the software as a shortcut.

Snapchat | 946 million monthly active users. Snapchat is closing in on the 1 billion user mark. The platform’s core audience skews young (under 25), and its disappearing content format creates a sense of urgency and authenticity. Snapchat’s AR (augmented reality) features are among the most advanced of any platform, with over 700 million people engaging with its AI-powered lenses. For brands targeting younger audiences, particularly in fashion, entertainment, and retail, Snapchat offers creative tools that other platforms lack.

Messaging and Communication Apps

Messaging apps have evolved beyond simple chat. Many now offer business tools, payment systems, and marketing features.

WhatsApp | 2.8 billion monthly active users. WhatsApp is the world’s most popular messaging app and the dominant communication tool across Europe, Latin America, Africa, and South Asia. In the UK and Ireland, it has become the default channel for community groups and informal business contact, often ahead of SMS or email. WhatsApp Business allows companies to create product catalogues, set up automated responses, and communicate directly with customers. For service businesses, click-to-chat buttons are worth building into your website design so an enquiry can start with a single tap.

Telegram | 950 million monthly active users. Telegram has crossed 950 million MAU and is now on a billion-user trajectory. Its focus on privacy, speed, and large-group functionality (channels can have unlimited subscribers) makes it popular for news distribution, community building, and niche-interest groups. Telegram is particularly strong in India, Brazil, and Russia.

Facebook Messenger | 1 billion monthly active users. Messenger remains widely used for personal and business communication. Its chatbot functionality and integration with Facebook’s advertising tools make it useful for automated customer service and lead generation.

Discord | 400 million monthly active users. Originally built for gaming communities, Discord has expanded into education, brand communities, and collaborative workspaces. Its server-based structure allows businesses to create dedicated spaces for customers, fans, or team members. Discord is particularly strong among audiences aged 18 to 35, and its growth reflects a broader shift from large public feeds to smaller, private communities.

Content Publishing and Discussion Platforms

These platforms focus on longer-form content, community discussion, and knowledge sharing.

Reddit | 500+ million monthly active users. Reddit organises conversations into topic-specific communities called subreddits. With over 100,000 active communities covering virtually every subject, the platform offers access to highly engaged niche audiences. Reddit’s user base has grown significantly since its IPO, and the platform now reaches well beyond its original tech-focused demographic. For businesses, Reddit works best when you genuinely participate in relevant communities rather than posting promotional content, as we cover in our guide to Reddit social media marketing.

Medium | Significant readership, exact MAU not publicly reported. Medium is a publishing platform for long-form articles, thought leadership, and storytelling. It functions well as a content distribution channel for businesses that want to reach audiences beyond their own website. Articles published on Medium can rank in Google search results and build author authority.

Tumblr | Niche but active community. Tumblr remains popular with creative communities, fandoms, and younger users who prefer a blend of blogging and social networking. It supports multimedia content, including photos, GIFs, videos, and audio. For businesses in creative industries, art, or entertainment, Tumblr offers an engaged audience that is often overlooked.

Quora | 300+ million monthly visitors. Quora is a question-and-answer platform where users ask and respond to questions on every topic imaginable. For businesses, answering questions related to your industry builds visibility and authority. Well-written Quora answers can rank in Google search results and drive traffic for months or years.

Visual Discovery and Creative Platforms

These platforms are built around images, design, and visual inspiration.

Pinterest | 500+ million monthly active users. Pinterest operates as a visual search and discovery engine. Users “pin” images to boards organised by theme, making it particularly effective for retail, home improvement, food, fashion, and lifestyle businesses. Pinterest drives significant website traffic because users actively seek ideas and products to purchase. The platform’s audience skews female (76% women) and tends to be in a buying mindset rather than a browsing one.

Flickr | 100+ million users. Flickr remains a photo-sharing platform used by photographers and visual creators. Its large library of Creative Commons-licensed images makes it a resource for content creators. Business applications are limited compared to Instagram or Pinterest, but photographers and visual agencies still use it as a portfolio platform.

Behance | Part of the Adobe ecosystem. Behance is Adobe’s platform for showcasing creative work, including graphic design, illustration, photography, and UI/UX design. It functions as both a portfolio site and a professional network for creatives.

Niche and Emerging Platforms

These platforms are smaller but serve specific audiences or represent growing trends, and they are part of any list of social media sites that competitors usually cover poorly.

BeReal | 100+ million monthly active users. BeReal prompts users to share one unfiltered photo per day at a random time. The format prioritises authenticity over polish, which has resonated particularly with Gen Z. Brand adoption is still limited, but the platform signals a broader move toward authentic, unedited content.

Lemon8 | 15+ million monthly active users. Owned by ByteDance (TikTok’s parent company), Lemon8 combines elements of Instagram and Pinterest. It focuses on lifestyle content: beauty, wellness, fashion, and food. The platform is growing in the UK and US markets and is worth watching for businesses in lifestyle sectors.

Mastodon | Decentralised, federated network. Mastodon is an open-source, decentralised social network that gained users during the Twitter exodus. It operates through independently run servers (instances) that can communicate with each other. A brand joins by selecting an instance whose community aligns with its audience, then posts as it would anywhere else, with the difference that there is no central advertising platform. The user base is smaller and more technically oriented than mainstream platforms, but the decentralised model is the clearest sign of where privacy-minded users are heading.

Audio and Music Platforms

Audio content has carved out its own niche on social media.

SoundCloud | 175+ million monthly users. SoundCloud allows musicians, podcasters, and audio creators to upload, share, and discover music and audio content. It tracks trending sounds and lets users create playlists. For businesses in music, entertainment, or podcasting, SoundCloud provides a distribution channel and community.

Spotify | 600+ million monthly active users (with social features). While primarily a music streaming service, Spotify’s social features (shared playlists, collaborative listening, podcast comments) give it social media characteristics. Spotify’s podcast platform is relevant to businesses investing in audio content marketing.

Regional and International Platforms

These platforms dominate in specific countries or regions.

For businesses operating internationally or targeting specific markets, these regional platforms are often more important than Western-focused networks. A social media strategy for the Chinese market, for example, needs to centre on WeChat and Douyin rather than Facebook or Instagram, which are blocked in mainland China.

Discontinued Platforms (Historical Reference)

Several platforms that were once prominent have since closed or been absorbed into other services:

• Google+ closed in April 2019
• Vine was discontinued in 2017 (its short-video format directly inspired TikTok)
• Musical.ly merged into TikTok in 2018
• Blab closed in August 2016
• Yik Yak closed in April 2017
• Periscope shut down in March 2021

These platforms shaped how social media evolved, and their features live on in the platforms that replaced them.

The Seven Types of Social Media

It helps to think about platforms by type rather than by name, because the type tells you what a platform is for. Most of the sites above fall into one of seven categories.

Social networking sites such as Facebook and LinkedIn exist to build and maintain relationships. Photo and image-sharing platforms such as Instagram and Pinterest centre on visual discovery. Video-sharing platforms such as YouTube and TikTok are built around watching and creating videos. Messaging and communication apps such as WhatsApp and Telegram handle direct and group conversations. Discussion and community platforms such as Reddit and Quora organise people around shared topics. Professional networks, of which LinkedIn is the dominant example, focus on business relationships and recruitment. Decentralised and privacy-first networks such as Mastodon and Bluesky give users more control over their feeds and data.

Knowing which type of platform it belongs to is the quickest way to determine whether it suits your business before you commit any time to it.

How to Choose the Right Platforms for Your Business

“Many businesses make the mistake of trying to be active on every social platform without understanding where their customers actually spend time,” explains Ciaran Connolly, founder of ProfileTree, a Belfast-based web design and digital marketing agency. “We have worked with over 1,000 clients since 2011, and the pattern is consistent: businesses that focus on two or three platforms where they can deliver genuine value outperform those spreading themselves across a dozen networks with sporadic posting.”

That argument against platform fatigue is the single most useful principle here. Two platforms done well beat five done badly, every time. Here is a practical framework for narrowing the list down.

Start with your audience, not the platform. If your customers are business owners and decision-makers, LinkedIn and YouTube should be your focus. If you sell consumer products, Instagram, TikTok, and Facebook are likely your highest-return channels. If you are targeting under-25s specifically, TikTok and Snapchat are where they spend the most time. This audience-first thinking is the starting point of any sound digital strategy, and it stops you from investing effort where your customers simply are not.

Match your content strengths to platform formats. If you are comfortable on camera or have video production capabilities, prioritise YouTube and TikTok. If your strength is written thought leadership, LinkedIn and Medium make more sense. If you have strong visual assets, Instagram and Pinterest will serve you well. Be honest about what you can produce consistently, because the format you cannot sustain is the wrong format.

Consider your resources honestly. Each platform requires different content types, posting frequencies, and engagement styles. A small business with one person handling marketing will get better results from two platforms done well than six platforms done poorly. When capacity is the limiting factor, digital marketing training often does more good than adding another channel, because it builds in-house skills to keep one or two platforms running properly.

Think about the full customer journey. Social media is one piece of the puzzle. Your profiles should drive traffic to a well-designed website that converts visitors into customers. Without that connection, social media activity generates attention but not revenue, so the website development behind your profiles matters as much as the posts themselves. The same joined-up thinking applies to search: as covered below, social and search engine optimisation reinforce each other when they are planned together.

Use cross-promotion to get more from each piece of content. A single YouTube video can become a TikTok clip, a LinkedIn article, an Instagram carousel, and a blog post. This multiplies your output without increasing your workload, which is why video so often sits at the centre of a content plan. ProfileTree works with SMEs across Northern Ireland and the UK to connect these channels rather than run them in isolation.

Choosing From the List

The full list of social media sites is long, but your shortlist should not be. Pick the two or three platforms where your customers already spend time, match them to content you can produce consistently, and connect every profile back to a website built to convert. That focus beats scattered posting every time. To plan a social media presence that supports your wider digital goals, talk to ProfileTree on 028 9568 0364 or at hello@profiletree.com.

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