Communication & Community

Slack is a messaging platform for organisations, organised around channels. A channel is a named conversation that can be public, private, or shared with an external organisation, and membership is a deliberate act rather than an accident of a contact list. The structure is what distinguishes it from a group chat. Threads keep a reply attached to its parent, so a channel is not consumed by a side conversation. Search covers message history and files, and a shared channel lets two organisations work in the same space without exchanging accounts. The platform's second half is the app directory and workflow builder. Incoming webhooks, slash commands, and bots let an external system post into a channel or accept a command from one, which is how alerts and approvals end up where a team already is. The cost is per-seat pricing and the fact that an organisation's conversation history lives in a vendor account.

Ghost is a publishing platform that combines a website, a newsletter, and paid membership in one system. A publication runs on Ghost, posts are delivered by email to subscribers, and paid tiers are managed through the same admin rather than through a separate membership plugin. The product is open source and can be self-hosted, and the hosted service is the commercial offering. Subscriptions are handled through Stripe, with the platform managing member records, tiers, and gated content. Because the site and the newsletter are the same system, a post does not have to be maintained in two places. The tradeoff compared with a hosted newsletter service is that Ghost expects the publication to be a website first. It is a good fit for a writer or a small media business that wants a domain, an archive, and a subscriber list under its own control; it is a heavier tool for someone whose only need is to send an email to a list.

Discourse is forum software designed for threaded, long-form discussion. Unlike a chat product, a topic is a first-class object with a title, a category, and replies that can be read in order, which makes a community's history searchable and referenceable. The platform adds the mechanics a community needs to stay healthy: trust levels that grant permissions as a member participates, flagging and moderation queues, and automated summaries. Topics can be categorised and tagged, and a topic can be marked as solved so the answer is visible without reading the thread. Discourse is open source and can be self-hosted, with a hosted plan as the alternative. It is a good fit for a product community, a support forum, or a standards discussion where answers should be findable later. It is a poor fit for real-time conversation, which is what a chat product is for.

Beehiiv is a newsletter platform built for operators rather than only writers. Publishing and delivery are the baseline; the product's emphasis is on the growth side, with referral programmes, recommendation networks, and paid subscription tiers built in. The referral mechanic is the notable feature. A publication can offer rewards for subscribers who bring in others, and the platform tracks the resulting attribution, which turns the audience into a distribution channel. An ad network connects publications with sponsors, so a free newsletter can earn without introducing a paywall. The platform is hosted and subscription-priced, with a free tier that carries the platform's branding. It suits a publication that intends to grow an audience deliberately; a writer who only wants to send email to a list will find the growth machinery unnecessary.

Substack is a publishing platform where a writer can start a newsletter and charge for it. The platform handles the website, the email delivery, the payment, and the subscriber list, and it takes a cut of subscription revenue rather than charging a monthly fee. The model is the reason it grew. A writer does not pay for software before earning anything: publishing is free and the platform's revenue comes from the subscriptions it processes. Paid and free subscribers can be on the same list, and a post can be public, free to subscribers, or paid-only. The tradeoff is control and portability. The audience lives on Substack's network, the design is largely fixed, and the platform's recommendations surface other writers to your subscribers. Writers who want a custom domain, their own design, and an exportable list sometimes move to self-hosted publishing software.

Farcaster is a social network protocol with a deliberately unusual property: an account and its messages are not owned by a single application. A user registers an identity, and posts are stored in a way that any client can read, so several applications can serve the same social graph. Messages are signed by the user's key and stored on a peer-to-peer network, with the identity registered on-chain. Because the graph is public and portable, a client is a view rather than the network itself, and a user can move between clients without losing their followers. Frames, an embedded interactive post format, made the protocol useful for applications beyond reading a feed. The model has real friction. Registration costs money, the user experience of managing a wallet and keys is unfamiliar, and the network is much smaller than a mainstream platform. Its appeal is to people who want the social graph to be a public good rather than a company's asset.