Discord

Sierra

Discord

Discord makes money primarily through Nitro — a $9.99/month subscription that gives users bigger file uploads, HD video streaming, custom emoji, animated avatars, and profile customization. There's also Nitro Basic at $2.99/month with fewer perks.

Server owners can pay for Server Boosts that unlock premium features for their community. Discord also added a cut of server subscriptions — creators can charge monthly membership fees and Discord takes 10%.

The key insight is that Discord's core product is completely free. Voice chat, text chat, screen sharing, communities with thousands of members — all free.

Nitro is cosmetic and convenience upgrades. Most users never pay and Discord is fine with that.

The free users create the network effects that make the platform valuable.

Sierra

Companies pay Sierra to run their customer service with AI agents instead of hiring rooms full of humans. The agent talks to your customers over chat.

It answers questions. It processes returns.

It updates subscriptions. Here is the clever part.

Sierra charges based on outcomes, not seats. Brands pay when the AI actually resolves a problem, not just for having the software installed.

That pricing is unusual. Most software charges a flat monthly fee no matter what.

Sierra only gets paid when the bot does the job.

Discord

Jason Citron had already built and sold a gaming company — OpenFeint, a social gaming platform for mobile, which GREE bought for $104 million in 2011. After that, he started Hammer & Chisel, a game studio that was supposed to make mobile games.

The game they built, called Fates Forever, was a mobile MOBA that got great reviews but almost nobody played.

What Citron noticed was that gamers were using terrible tools to communicate. TeamSpeak was clunky.

Skype was laggy. Nothing worked well for groups of people who needed to talk while gaming.

The internal voice and text chat tool that Hammer & Chisel had built for their own team worked better than anything on the market.

Citron and co-founder Stan Vishnevskiy pivoted the entire company. They stripped out the gaming stuff and launched Discord in May 2015 as a free voice, video, and text chat platform for gamers.

It spread through Reddit first — a post on the r/gaming subreddit went viral and crashed their servers on day one. Within a year they had 25 million registered users.

Sierra

Bret Taylor had already done the impossible twice. He co-created Google Maps.

He later became co-CEO of Salesforce, chaired Twitter's board during the messy Elon Musk takeover, and became chairman of OpenAI in late 2023. Clay Bavor spent 18 years at Google, most recently running its Labs group.

The two friends left their big jobs in 2023 to build something together. They picked customer service on purpose.

It is the least glamorous corner of software. Their logic was simple.

Companies hate their support costs. Customers hate waiting on hold.

AI that actually resolves problems could fix both sides at once. They launched Sierra in February 2024 with $110 million from Sequoia and Benchmark.

Discord

Discord grew through communities, not ads. The first users were gamers on Reddit and Twitch who were sick of TeamSpeak and Skype.

Streamers would set up Discord servers for their fans, and every viewer who joined brought their friends. The growth was entirely organic for years.

The bot ecosystem was the secret weapon. Discord made it trivially easy to build bots — automated programs that add functionality to servers.

Music bots, moderation bots, gaming bots, utility bots. Developers built tens of thousands of bots, each one making Discord servers more useful and sticky.

A server with good bots became a mini-app platform.

COVID and the "beyond gaming" shift were massive. When lockdowns hit, study groups, book clubs, art communities, crypto communities, and just friend groups all started using Discord.

By 2020, non-gaming usage overtook gaming usage. Discord quietly dropped the "for gamers" tagline and rebranded as a platform for communities of all kinds.

Sierra

Sierra went straight for big brands, not tiny startups. SoFi, Ramp, ADT, Sonos and Brex signed up early.

By 2026 it said more than 40% of the Fortune 50 were customers. The trick was trust.

Enterprises are terrified of an AI bot going rogue and insulting a customer. So Sierra built guardrails and let each company control exactly how the agent behaves.

Bret Taylor's contacts did the rest. When the chairman of OpenAI calls a Fortune 500 CEO, they pick up.

Sierra hit $100 million in annual recurring revenue in November 2025, seven quarters after launch, and $150 million by February 2026. In April 2026 it launched Ghostwriter, which builds and deploys a new agent from a plain-English description.

Discord

Monetization has been the eternal question. Discord has 200 million monthly active users but has never turned a profit.

Nitro subscriptions are growing but most users are happy on the free tier. Unlike Facebook or Twitter, Discord doesn't run ads — they've explicitly said ads in DMs or chat would destroy the product.

Finding ways to monetize without betraying user trust is the core challenge.

The Microsoft acquisition saga. In early 2021, Microsoft reportedly offered $12 billion to buy Discord.

Citron and the board walked away. The thinking was that Discord could grow into something worth much more independently.

Whether that was the right call depends on whether Discord can eventually figure out profitability — Microsoft would have solved that problem instantly with its distribution.

Content moderation at scale is brutal. With millions of servers and hundreds of millions of users, Discord has struggled with harmful content — extremist groups, CSAM, doxxing, and harassment.

They've invested heavily in trust and safety teams and automated detection, but the decentralized nature of servers makes moderation much harder than a centralized feed like Twitter or Facebook.

Sierra

Everyone is building AI customer service agents right now. Decagon has raised at a multi-billion valuation.

Salesforce, ServiceNow and Intercom all shipped their own agents. Sierra is not the cheap option.

It sells premium AI to giant companies that move slowly. The bigger risk sits underneath the product.

Sierra does not make its own AI models. It rents them from providers like OpenAI and Anthropic.

If those model makers decide to compete directly, Sierra's edge gets thin fast, and its co-founder chairing one of them only makes that question louder. A $15.8 billion valuation on roughly $150 million in revenue leaves almost no room for a stumble.

Discord

Discord's core is servers — community spaces organized into text and voice channels. Think of a server like a clubhouse with different rooms for different topics.

Voice Channels let you drop in and out of audio conversations like a walkie-talkie. Stage Channels are for live audio events with audiences.

Forum Channels organize discussions by topic. Discord also has direct messaging, group chats, video calls, screen sharing, and a growing app/bot ecosystem.

Activities let users play games and watch videos together inside Discord calls.

Sierra

The core product is the Sierra AI agent. It is a branded customer service bot that companies deploy on their website, app, and phone lines.

It handles the boring stuff. Order tracking.

Refunds. Password resets.

Account changes. Sierra also built its own tools to test and monitor these agents so they do not make things up.

In 2024 the company added a voice version that talks to customers on the phone. In April 2026 it added Ghostwriter, a tool that builds and deploys a new agent from a plain-English description.

The whole pitch is one AI agent that carries your brand's name and never sleeps.

Discord

Benchmark, Accel Partners, Greylock Partners, Index Ventures, Greenoaks Capital, Dragoneer Investment Group, Spark Capital, Fidelity Investments

Sierra

Sequoia Capital and Benchmark wrote the first checks at launch in February 2024, $110 million between them. Greenoaks Capital then led both the $175 million round in 2024 and the $350 million round in September 2025.

In May 2026 Tiger Global and Google's GV led a $950 million round at a $15.8 billion valuation, with Benchmark, Sequoia and Greenoaks back in. That takes total funding to about $1.6 billion.

That is partly the product and partly Bret Taylor. Investors bet on founders who have already built billion-dollar things.