# Synthesis

Polymarket and Kalshi in one browser desk, with copytrading and a shared portfolio.

*https://predictionmarkets.tools/tools/synthesis · Trading Clients, SDKs & Bots*

## Facts

### At a glance

| Field | Value |
| --- | --- |
| Vendor | Synthesis |
| Category | Trading Clients, SDKs & Bots |
| Job | terminal |
| Website | https://synthesis.trade |
| Pricing model | free |
| Free tier | true |
| Open source | false |
| Licence | none |
| Self-hosted | false |
| Tested hands-on | false |
| Last updated | 2026-09-20 |

### Availability

| Field | Value |
| --- | --- |
| Jurisdictions | ca, eu, asia, latam |
| Open to US persons | false |
| KYC required | false |

### Markets

| Field | Value |
| --- | --- |
| Subjects | politics, sports, macro, crypto, science, culture, business |
| Settlement | crypto |
| Resolved by | none |

### Economics

| Field | Value |
| --- | --- |
| Liquidity model | clob |
| Platforms | web |
| AI features | none |

### Interfaces

| Field | Value |
| --- | --- |
| API | false |
| WebSocket | false |
| Scripting | none |
| Python | false |
| MCP server | false |
| Export | none |

### Capabilities

Yes: charting, screening, order_book, automation, live_trading, portfolio_tracking, cross_venue, news

No: backtesting, paper_trading, calibration_scoring, alerts, tax_reporting

*Verified: pricing 2026-09-20; availability 2026-09-20; capabilities 2026-09-20; markets 2026-09-20.*

## What it is

A browser trading desk that puts the position, the chart and the record of what other addresses
are doing on one screen, across two venues instead of one. The navigation is five items — Trade,
Multiview, Discover, Copytrade, Portfolio — and the site's front door is not a marketing page but
a market, already priced, with the trade panel open.

On a market page you get a candlestick chart with 1H through ALL ranges, the price, 24-hour volume,
liquidity and close date, every outcome in a multi-outcome event with its Yes and No quote side by
side, and tabs for orders, positions, copytrades, activity, news, related markets, top holders, the
resolution rules and a chat. The order ticket takes market and limit orders in shares. Charting is
TradingView's library, which the terms say in as many words.

Discover is the screener half: filter by venue — Polymarket or Kalshi — by category, by tag, sort
by volume, liquidity, newest or ending soon, and there are standing tabs for arbitrage and for
bonds. Multiview is a several-markets-at-once desk and refuses to load below desktop width, which
tells you which machine the product was designed for.

Copytrade is its own section rather than a feature buried in a settings page. You add a target, pick
a mode, set allocated funds and a buy amount, and the subscription runs until you stop it. Sign-in
is email, Google, an EVM wallet, Solana or Telegram.

## Availability

**Trading from the United States is barred by the terms, in capitals.** The Terms of Use name the
United States, the United Kingdom, France, Ontario, Singapore, Poland, Thailand, Australia, Belgium
and Taiwan, plus the comprehensively sanctioned territories, and follow the list with the sentence
that there are no exceptions. Using a VPN to get around it is prohibited, and the stated consequence
is that a wallet may be placed in close-only mode.

**Reading is a different permission from trading, and the terms say so explicitly.** The site is
split into what it calls content features — the market data, the news, the prices — and technology
features, which are the wallet-signed messages that place a trade. A person in a restricted
jurisdiction is permitted the first and not the second. In practice that is why a US reader can open
any market on the site and see it priced.

**The document contradicts itself about two countries.** The capitalised notice at the top lists
Australia and Belgium among the restricted places; the defined term "Restricted Jurisdictions"
further down the same page does not name either. If you are in one of those two, you are reading a
document that says both things.

There is no identity check. Sign-in is an email address, a Google account, a wallet signature or
Telegram, and nothing on the way in asks for a document. That is a fact about Synthesis and not
about the venue behind it — Polymarket runs its own restriction list, which is stricter than this
one in Europe, and it is the one that decides whether a fill happens.

Read from the vendor's own Terms of Use and Privacy Policy on 20 September 2026. Neither document
carries a last-updated date, which is the second thing to know about them.

## Pricing

**No price and no fee schedule is published anywhere.** There is no pricing page — the path 404s —
no fee page, and the Terms of Use, which run to several thousand words and cover indemnity,
arbitration and a liability cap of 100 US dollars, never mention a charge to the user. The site is
usable, browsable and priced without an account.

Treat that as unstated rather than as free. A front end that routes orders to somebody else's order
book has an obvious place to take a margin — inside the fill — and the absence of a fee page is not
evidence that nothing is taken. What you will pay for certain is the venue's own cost: on
[Polymarket](https://predictionmarkets.tools/tools/polymarket) that is the taker fee applied to the price, and on
[Kalshi](https://predictionmarkets.tools/tools/kalshi) it is the exchange's own formula.

The fee fields on this card are left empty rather than set to zero. Empty renders as "unknown",
which is the honest state; zero would render as "None" and say we established that Synthesis takes
nothing, which we did not.

Checked against the site on 20 September 2026. If a fee page appears later, this section is the one
that is wrong.
that is wrong.

## Markets & resolution

Synthesis resolves nothing and lists nothing. Every question, every price and every outcome belongs
to the venue underneath — Polymarket's on-chain markets, settled in USDC on Polygon and resolved
through the UMA optimistic oracle, and Kalshi's exchange-listed contracts, resolved under a
rulebook filed with the CFTC. Those two resolution regimes are not alike, and a screen that renders
them in the same row does not make them alike: one can be disputed by a token holder posting a bond,
the other cannot.

The venue label is printed on each market page, which is the one thing a cross-venue desk has to get
right. The categories the discovery page browses by — crypto, sports, US politics, geopolitics,
mentions, economics, finance, companies, tech, culture, science — are its own grouping over whatever
the two venues list, not a taxonomy either venue publishes.

## Integrations

The charting is TradingView's library, named in the terms. Sign-in accepts email, Google, an EVM
wallet, Solana and Telegram. The portfolio page carries an API tab beside Overview, Rewards and
Settings, but it sits behind the login wall and there is no public documentation anywhere on the
domain, so nothing here claims an API exists in a form you could build against — the flag above says
no because what is behind that tab was not opened.

There is no repository, no published SDK, no MCP server and no export button.

## Limitations

**Nothing about the product is dated.** No changelog, no version number in the interface, no
last-updated line on either legal document. For a product that holds an order ticket over somebody
else's order book, that is the single most useful missing fact, because a terminal breaks when the
venue changes its API and you would learn about it from your own failed order.

**Copytrading is an instruction to submit orders on your behalf.** The mechanics that decide whether
it works — how fast a leader's fill is detected, what happens when the price has already moved, what
the minimum size is — are not documented on the site, and the terms disclaim any responsibility for
execution price, slippage, partial fills or failure to execute at all.

**A liability cap of 100 US dollars.** The terms set the company's aggregate liability at that
figure, choose Panamanian law, and require individual arbitration in Panama with a class-action
waiver. That is the recourse, stated plainly, and it is worth reading before the deposit rather
than after.

**Nothing is open source and nothing is self-hosted.** If the front end goes away, so does every
view you built in it. Positions are on-chain and would survive; the desk would not.

## Alternatives

[PMXT](https://predictionmarkets.tools/tools/pmxt) and [CCXT](https://predictionmarkets.tools/tools/ccxt) are the code version of the same idea — one interface
over several venues — and they run on your keys instead of somebody else's front end, which is the
trade for having to write the interface yourself. [Predictefy](https://predictionmarkets.tools/tools/predictefy) sells a hosted
multi-venue layer with documented endpoints and a published price.

If what you actually want is the analytics and not the order ticket,
[Polyrama](https://predictionmarkets.tools/tools/polyrama) and [Polymarket Analytics](https://predictionmarkets.tools/tools/polymarket-analytics) do the reading
half without asking you to route a trade through them. And if you are in the United States, no
front end fixes that: the venue you can use is [Polymarket US](https://predictionmarkets.tools/tools/polymarket-us) or
[Kalshi](https://predictionmarkets.tools/tools/kalshi) directly.

## FAQ

### Who operates Synthesis?

Ryne Labs, Inc. The name Synthesis is the product; the company appears only inside the Terms of Use and the Privacy Policy, and the contact address given for privacy questions is at the synthesis.trade domain. Nothing on the site says where the company is incorporated, and the terms choose Panamanian law and arbitration in Panama.

### Can I use it from the United States?

Not for trading. The terms name the United States first in a capitalised list of places barred from using the site or its technology features to trade, and add that there are no exceptions and that a VPN to get around it is prohibited. Reading the market data is a separate permission and is allowed.

### Does it trade Kalshi as well as Polymarket?

Kalshi markets are in the discovery listing and the platform filter, and the terms bind you to Kalshi's member agreement as well as Polymarket's. Whether an order you place is actually routed to Kalshi is not something we opened an account to confirm, and the terms describe the trading half as wallet-signed messages to a blockchain.

### What does Synthesis charge?

Nothing is published. There is no pricing page, no fee schedule, and the terms do not mention a service fee at any point. That is not the same as free - it means the vendor has not said, and a routing spread taken inside a fill would not be visible from outside.

## Background

- [What running a bot does not solve](https://predictionmarkets.tools/guides/what-a-bot-cannot-fix.md) — A bot fixes speed and consistency. Rate limits, a missing rehearsal, a field that stops arriving, a partial fill and a paused market are not coding problems.

- [Where your key lives when software trades for you](https://predictionmarkets.tools/guides/where-your-key-lives.md) — Four different credentials are all called a key, and they differ in what a copy permits. What the clients in this catalogue ask for, and what to ask them back.

## Also worth comparing

- [Polycool](https://predictionmarkets.tools/tools/polycool.md) — Phone-sized Polymarket client with copy trading, parlays and a fee of its own.
- [Polyrama](https://predictionmarkets.tools/tools/polyrama.md) — Polymarket and Kalshi in one terminal, with wallet analytics and a REST API.
- [Polymarket CLI](https://predictionmarkets.tools/tools/polymarket-cli.md) — Polymarket's Rust command line - MIT in the manifest, with no LICENSE file in the repo.
- [Alphapoly (polymarket-alpha-bot)](https://predictionmarkets.tools/tools/polymarket-alpha-bot.md) — Self-hosted scanner for covering portfolios across correlated Polymarket contracts.
- [CCXT](https://predictionmarkets.tools/tools/ccxt.md) — One client for seven prediction venues, inside a 104-exchange crypto library.
- [limitless-sdk](https://predictionmarkets.tools/tools/limitless-sdk.md) — Limitless Exchange's own async Python SDK - CLOB and NegRisk orders, WebSocket, MIT.

## Named as a replacement for

- [Fireplace](https://predictionmarkets.tools/alternatives/fireplace.md)