Cycling through all six. Tap any point to stop.

Measured on six things

Prediction markets for real-world events

Speed

Lighthouse mobile 31/100 with a 13.6s LCP and 9.3s FCP; desktop 44/100. The heavy landing page with a live chart and 16+ market cards is the likely culprit. This is slow enough to lose users before they trade.

Screenshots

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Melbo

About this app

Melbo is a prediction market app for real-world events: politics, sports and esports, crypto, the economy and technology. Each market is a Yes/No question. A share's price is the market's probability of the outcome (63¢ = 63%). Shares on the outcome that happens settle at $1; positions can be sold before settlement. Built for people new to on-chain markets: sign-in with email, Google or Telegram, no seed phrase, network gas covered, trades from $1, 18 languages and 24/7 chat support. How it works. Melbo is non-custodial: each user's wallet is created at sign-up, belongs to the user and can be exported. Trades settle via smart contracts of a third-party decentralized liquidity protocol on Polygon; a decentralized oracle resolves markets under rules published in advance. USDC on Polygon, no fiat. Fees: 1% plus a liquidity fee on market orders; limit orders, deposits and withdrawals are free. Not available in restricted jurisdictions. Trading involves risk; not investment advice.

Key features

1Email, Google, or Telegram sign-in with no seed phrase and gas covered — trades from $1 in USDC on Polygon
2Non-custodial wallets created at sign-up, exportable by the user, settled via third-party decentralized liquidity protocol
3Yes/No markets across politics, sports, esports, crypto, economy, tech, with share price as probability and pre-settlement selling

Target customer profile

Drawn from the product itself, not from a survey.

Demographic

Adults who follow politics, elections and the economy

Pain points

Hard to put a number on what they think will happen

Primary needs

Yes/No markets where the price shows the probability

Demographic

Sports and esports fans

Pain points

On-chain markets need wallets, extensions and seed phrases

Primary needs

Demographic

Crypto users interested in event trading

Pain points

Network gas and fees add up on small trades

Primary needs

Non-custodial wallet, gas covered, USDC on Polygon

Scout Review

Written by AI from measured evidence, scored out of 100.

Melbo is a prediction market for people who've never used one — and that's its whole bet. Email/Google/Telegram sign-in, no seed phrase, gas covered, trades from $1, 18 languages, live chat. Against Polymarket's wallet-and-extension gauntlet, that's a real on-ramp. The execution is uneven: the homepage is dense and Russian-first, mobile performance is genuinely bad (31/100, 13.6s LCP), and security headers are thin despite a solid non-custodial architecture. Design is competent but crowded; accessibility is above average. The idea is sound and the category has room, but the moat is a UX layer the incumbents can copy. Melbo needs to fix speed and ship English-first before the wedge closes.

Measure by measure

Usability

Email/Google/Telegram sign-in, no seed phrase, gas covered, $1 minimum, live chat on the homepage — genuinely low-friction onboarding. The dense Russian-first homepage and cluttered nav cost it points.

Design

Dark theme with clean green/red probability coding and a memorable split-circle logo, but the 4-column card grid is cramped, the featured chart is a tangle of overlapping lines, and the nav bar is overloaded.

Speed

Security

HTTPS enforced with SPF and DMARC, and the non-custodial/Polygon/oracle architecture is a real security story. But only 4/12 security headers, no HSTS, CSP, or frame protection, and no published audit or bug bounty found.

Accessibility

Lighthouse accessibility 90/100 and 18 supported languages are real strengths. Failing audits on color contrast, aria-hidden focusable descendants, and a missing main landmark keep it from the top of the band.

Growth

Real, growing category with clear demand. Melbo's wedge — no seed phrase, gas covered, $1 trades, 18 languages — targets the on-chain-curious who bounce off Polymarket's friction. Differentiated but not defensible.

Improvement areas

Mobile performance: 31/100 Lighthouse, 13.6s LCP — the landing page is too heavy for a trading product
Security headers: only 4/12 present; no HSTS, CSP, or frame protection despite non-custodial architecture claims
English-first defaults and locale auto-detection to match the 18-language claim
Accessibility: fix color contrast, aria-hidden focusable descendants, and the missing main landmark

Design & Usability

Melbo's design is competent but crowded. The dark theme, green/red probability pills, and split-circle logo give it a coherent identity, and the featured market card with its probability badge is a nice focal point. The problem is density: a 4-column grid of 16 tiny cards, a chart with three overlapping lines, and a nav bar with more tabs than a spreadsheet. Usability is where Melbo actually shines — email/Google/Telegram sign-in, no seed phrase, gas covered, trades from $1, and a live chat widget promising responses in minutes. That's a genuinely thoughtful onboarding for people who've never touched an on-chain market. The cost is a Russian-first homepage with no obvious English fallback on load, which narrows the audience the 18-language claim implies.

Speed & Security

Speed is Melbo's weakest measured dimension. Lighthouse mobile scores 31/100 with a 13.6-second LCP and 9.3-second FCP; desktop is 44/100. A landing page that loads a live chart and 16+ market cards before anything is interactive is going to shed users at the door, and for a trading product where timing matters, that's not cosmetic. Security is a mixed picture. The architecture — non-custodial wallets, third-party decentralized liquidity on Polygon, decentralized oracle resolution — is a legitimate story, and HTTPS with SPF and DMARC is in place. But the HTTP probe found only 4 of 12 security headers: no HSTS, no CSP, no frame protection, no X-Content-Type-Options, no Referrer-Policy. No published audit, SOC 2, or bug bounty surfaced in the collected evidence.

Accessibility & Growth

Accessibility lands at a respectable 70. Lighthouse scores 90/100 and the site claims 18 languages, which is more than most competitors bother with. The failing audits are real but fixable: insufficient color contrast, focusable descendants inside aria-hidden elements, and a missing main landmark. None of these are structural. Growth is the more interesting question. Prediction markets are a real, expanding category, and Melbo's positioning — no seed phrase, gas covered, $1 minimums, 18 languages — is a genuine wedge against Polymarket's friction and Kalshi's US-only regulatory posture. But the wedge is a UX layer, not a moat: Polymarket can add email sign-in, and the liquidity advantage stays with the incumbents. Melbo can win the on-chain-curious beginner, but it needs to convert them before the giants copy the onboarding.

Conclusion

If you've been curious about prediction markets but bounced off Polymarket's wallet setup, Melbo is the friendliest on-ramp in the category right now. Just don't judge it by the homepage — the 13-second mobile load is a bug, not a feature, and the Russian-first default hides the 18-language claim. The architecture is honest, the onboarding is thoughtful, and the $1 minimum makes it cheap to try. What it needs next is speed, English-first defaults, and a published security audit to match the non-custodial story. Worth a look; not yet worth your whole bankroll.

Suggestions for improvement

Fix mobile performance: 13.6s LCP is losing users before they trade. Lazy-load the card grid and chart below the fold.
Ship English-first defaults or auto-detect locale — the 18-language claim is undercut by a Russian-only homepage render.
Add HSTS, CSP, and frame protection; publish a security audit or bug bounty to back the non-custodial architecture.
Fix the three failing a11y audits: color contrast, aria-hidden focusable descendants, and the missing main landmark.

How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

	Melbo	Polymarket	Kalshi
Sign-in / onboarding friction	Email, Google, or Telegram; no seed phrase; gas covered	Crypto wallet required; seed phrase and gas management typical	Email sign-up with KYC; US-regulated account required
Minimum trade size	From $1	Low, but gas and wallet setup add friction	Low; fiat-funded account
Regulatory posture	Not available in restricted jurisdictions; no US regulatory license claimed	Crypto-native; historically restricted US access	US-regulated exchange (CFTC)
Liquidity depth	Aggregated via third-party decentralized liquidity protocol on Polygon	Largest crypto-native prediction market liquidity	Deep regulated order books on economic/political events
Language support	18 languages claimed	Primarily English	Primarily English