Opportunities › Open-source presentation software alternative › Proposed app
Plainslide
Make, open and present slide decks in your browser, with files you own
- Score
- 52
- confidence 53
- Evidence
- 5
- items on the page
- Rivals
- 2
- named in sources
- First version
- 75 d
- estimate
- Type
- Desktop and mobile
- PWA: on computers and phones alike
- Market since
- 1987
- Mature market · AI estimate
ScreensConcept
Desktop and mobile: Users build and edit decks at a desk with keyboard work, but present and view from anywhere using presenter view and share links. Sample screens on a computer and a phone, in the proposed brand. Their numbers are sample data.
Import check
Ready to edit3 items
About this appAI proposal
Plainslide is a presentation app that runs in the browser and installs like an app. It opens and saves .pptx files, so a deck made here can be opened elsewhere, and a deck from elsewhere can be opened here. Your slides stay in a format you can take with you.
It is made for teachers, small teams and individuals who pay for a slide tool mainly to make and show decks. The editor covers text, shapes, images, tables, notes and presenter view, and works offline once installed.
Unlike cloud-only tools, a deck is a file first and a web page second. Share a read-only link when you want, or export and walk away. Pricing is a flat low monthly fee, with a free plan for everyday use.
- Tagline
- Slides in a file you own.
- Voice
- PlainCalmPractical
- Why this name
- Two plain words: no frills, just slides. It signals simple decks and open files, and is easy to say and spell.
In the first version
Members say which features they would use. It tells PWAS what people want; it changes no score.
Open and save .pptx
Import existing decks and export finished ones, so you are never locked in. Unsupported items are flagged on import instead of silently dropped.
No member yet
Works offline
Install it as an app and keep editing on a train or in a classroom with no signal. Changes sync when you reconnect.
No member yet
Presenter view
Speaker notes, next-slide preview and a timer on one screen, while the audience sees only the slide.
No member yet
Share a view-only link
Send a link to a deck that opens in any browser. No account needed to watch, and you can turn the link off at any time.
No member yet
Brand identityAI proposal
Check the name against trademark registers before using it.
Palette
#1F6F5CPine · primary#F7F3EAPaper · surface#1F2A2EInk · text#E0752DEmber · accent#3E5C9ASlate blue · data
Typography
Aa
Plainslide
ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789
Slides in a file you own.
PricingAI proposal
Microsoft PowerPoint lists paid plans from $9.99 to $19.99 a month plus a free plan (verified). Google Slides prices are on request. These tiers sit below PowerPoint and are a starting point to test.
Free
Free
- Unlimited local decks
- Open and save .pptx
- Offline use
- View-only links with a small footer
Personal
$4 a month
- Cloud sync across devices
- Links without footer
- Presenter view with timer
- Full-deck backup
Team
$7 a month
- Per user, 3 or more users
- Shared decks and comments
- Shared templates
- Version history
What it could be worthEstimate
What a software business making this much sells for today, from real deals. Pick a monthly revenue.
If it makes
Worth about
$194,000
Sale range $132,000 to $263,000
$120,000 a year in revenue
From 87 software businesses listed and sold on Empire Flippers in the last year, revenue vetted by the broker: they sell for about 19× their monthly revenue, most between 13× and 26×.
Measured on profit, the middle deal is 32× monthly net profit: about 2.7 years of profit.
An estimate, not an offer or financial advice. A real price depends on profit, growth, churn, how much of the work is the owner's, and the buyer.
How it would growAI proposal
How the product would reach new customers through its own use, and how the first ones would be found. A plan to test, not a result.
- Built-in loop
- Shared outputs. Free-plan view links and exported decks show a small 'Made with Plainslide' footer. Audiences watching a shared deck see how the app works and can open the link in a browser.
- Do they become customers?
- Viewers are often students or colleagues who also make decks, so some may sign up, but this is unproven. Test how many link viewers click through and create a deck.
- First customers
- Secondary and university teachers in one country who pay for or are pushed toward a subscription slide tool, and make weekly lesson decks.
- Where to reach them
- Teacher communities: Post in teacher forums and groups with a free template pack and a short video on opening existing decks.
- Open-source communities: Share a build-in-public thread where people interested in free presentation software can test and give feedback.
- First milestone
- Fifty teachers import a real deck, and ten of them pay for Personal within 60 days.
Why people already pay for this
- VerifiedGitHub repository gained 3581 stars in 10 days
- Public claimOpen-source clean-room reimplementation of Microsoft PowerPoint addressing the market for presentation software
- AI inferenceRepository has significant adoption and community interest with over 3,500 stars and 2,000 forks
- VerifiedGoogle Slides sells paid plans with prices on request, on its own pricing page, plus prices on request for larger customers
- Verified
Tech stack
Every proposal builds on the same PWA base, installable from the browser on any phone or computer. Dashed boxes are what this app adds.
- AppNext.js and TypeScript
- PWAManifest and service worker
- UITailwind CSS
- Data and authSupabase Postgres
- PaymentsStripe
- EmailResend
- HostingVercel
- This app · File conversionOpen-format .pptx reader and writer libraryImporting and exporting .pptx accurately is the core promise and needs a dedicated parser.
- This app · Object storageS3-compatible file storageDecks hold images and fonts that are too large for database rows.
RisksAI inference
- TechnicalFaithful .pptx import and export is hard. Animations, SmartArt and embedded fonts may not match, and one badly broken deck can lose trust.
- CommercialFree open-source and bundled alternatives exist, and the material shows interest in a free project. Users may not pay for a hosted version.
- TechnicalOffline editing with later sync can create conflicts in shared decks, and browser storage limits can hit large decks.
- Intellectual propertyDescribing the product as compatible with a vendor's file format needs care so the wording does not imply endorsement or copy the vendor's look.
Everything marked AI proposal or AI inference was written by a model from the evidence on the opportunity page. The proposed name must be checked against trademark registers before it is used.