A (long) review of prediction market software

November 13th, 2007

It seems that each month brings one or two new entrants to the prediction market software industry. (I can’t bring myself to use the term “space.”) There is now a lot of variety in the industry, with well-established companies, open source options for the ambitious, and new entrants that are pushing the envelope of what we consider a prediction market. As a consultant that works with a number of these companies to help meet my clients’ needs, I thought it would be useful to review the options as of November 2007.

This is my review of the different software available. Please comment below or contact me with comments, criticism, or corrections. All views below are mine and mine only.

I’ve tried to address software that you can license/download to use on your site, as well as public sites. This post is long, but is comprehensive.

Top Vendors

All of the following prediction market software vendors are well established in the industry, and have a background of successful clients and projects. I have personally talked to or worked with all of these companies, and would certainly recommend any of them. They are listed in alphabetical order.

ConsensusPoint - ConsensusPoint licenses their ForesightServer software, either as a hosted, on-demand solution or on a server within your network. Written largely by Ken Kittlitz, the software has evolved over a number of years and with feedback from a significant number of clients. A particular benefit is the potential separation between the front-end user interface and the back-end market software and database. Depending on how much time and effort you want to invest, you can completely design your own user interface for a custom solution.

Who to talk to – Dave Perry

Gexid - Gexid is a new software package, and has been used by Nokia in a project run by Bernd Ankenbrand, who just finished his PhD. I don’t know much about the software, but Bernd had some interesting results that he presented at the London prediction markets conference. From what I understand Gexid integrates a good chunk of consulting effort to complete a prediction market solution. Company established in Germany.

Who to talk to – Bernd Ankenbrand

Hollywood Stock Exchange - HSX is still the most prominent play-money prediction market out there. It, too, has over ten years worth of development effort. From what I understand, using HSX as your prediction market platform is most suitable for quite large-scale projects. Their past clients include big media prediction markets associated with magazines, television shows, etc. The back-end tools around data reporting and demographics on the system are particularly powerful, as they are the core of the main HSX business.

Who to talk to – Alex Costakis

Inkling - Inkling is one of the “new” kids on the block, having only been started in fall of 2005. (It was developed and partially funded through Paul Graham’s Y Combinator program.) Developed using the Ruby on Rails platform/framework, it has a slick user interface and can easily be rolled out for your needs. A particular benefit is their recent automatic free trial promotion… just sign up on their site and get going!

Who to talk to – Adam Siegel

InTrade/Tradesports - While InTrade and TradeSports are two separate companies now, the same software platform powers them both. They have occasionally licensed this platform for use by other organisations. Most prominently, the Financial Times used the InTrade platform to run the FTPredict site this summer (as discussed at the London conference here.) Though it can potentially be a bit expensive, the biggest benefit of this software is the “battle-hardened” nature of the platform.

Who to talk to – John Delaney

Newsfutures - Newsfutures is one of the few veteran prediction market software platforms, having been originally developed in 2000. They have a strong team, and have developed further related products for companies that don’t feel comfortable with a strict prediction market. (These include their competitive forecasting and idea pageant products.) The benefit of Newsfutures is that they do have these innovative ways of getting the same information in a structure that may be more appropriate for a particular company.

Who to talk to – Emile Servan-Schreiber

Nosco - Nosco has been around for about 18 months now, and has developed a great looking suite of software packages around prediction markets and collective intelligence. They talked about these at the London prediction market conference, and they include a news exchange, idea exchange, and traditional prediction market. So far they’ve had two top-tier clients in Denmark. They clearly have an excellent web design and graphic design team; everything they produced (slides, screenshots) were extraordinarily well done. Company is established in Denmark.

Who to talk to – Jesper Muller-Krogstrup and Oliver Pedersen

Pro:kons – Pro:kons has been in the prediction markets business for a decade, in some form or another. Their work now consists of prediction markets and new media projects. They’ve done some impressive work getting a prediction market platform rolled out for Swiss public television to predict the recent Swiss elections. In order to do this, they had to work with seven different television station identities and four official Swiss languages! They also presented at the London prediction market conference. Company is established in Austria.

Who to talk to – Gunther Fadler and Peter Gollowitsch

OpenSource Options

A number of open source prediction market software packages have been developed over the years. The software listed below is Beta-level or more stable.

Zocalo – Zocalo is written by Chris Hibbert, who was partially supported by CommerceNet during one phase of the development. It is certainly still in development, and you can contact him for more details.

IdeaFutures (aka ConsensusPoint, version 1) – IdeaFutures is the original version of ConsensusPoint’s software. When the ConsensusPoint ForesightServer software was completely rewritten, the previous version of source code was open-sourced. Though clearly not as fancy as the current version, this is certainly a stable and well-used platform.

Serotonin – I’m not terribly familiar with this piece of software, but it is listed as a Stable/Production-level in SourceForge.

MarMix – MarMix is based on USIFEX, which was previously developed by Peter McCluskey. It’s listed as Beta-level in SourceForge.

USIFEX – USIFEX is a prediction market platform that is no longer running, but does openly provide the source code at the link above.

Idea/Innovation Management specific software

These companies/solutions don’t offer prediction market software, but do offer solutions that are close cousins – software for idea selection.

Rite Solutions – Rite-Solutions “Innovation Engine” software was featured in a New York Times article last year. While not strictly a prediction market, their software certainly embodies collective intelligence and crowd wisdom. Employees can submit new ideas, help fund ideas with play-money, and also help move the ideas ahead by completing small tasks that are necessary to move the project forward. In addition to an Idea selection software, it’s really an Idea Management software.

InnovateUs – Again, InnovateUs is not a traditional prediction market software, but uses funding and voting to help identify new ideas out of a pool. They have at least one great client, and are based out of Chicago.

New prediction market software sites

Some of these companies provide private markets for organisations, and some just maintain a public site. I’ve tried to detail the differences below.

PrediCom – PrediCom has been working with prediction markets for a few years, and they have their own platform. They don’t seem to do much work here, and their software is always tied into their consulting services.

Xpree – Xpree was started this summer by Mat Fogarty, who previously championed and ran prediction markets at Electronic Arts using Inkling. They have gotten a beginning version of their software running that you can trial here. Xpree is focusing on a solution that is extremely simply for people to use, to help encourage maximum participation in a business environment. (Mat discussed this at the London prediction market conference.)

Nimanix – Nimanix is a new prediction market software company headquartered in Tel-Aviv. They maintain a (lightly-traded) public market, and are actively selling their solution to business clients. Their software appears to be a strict CDA model, with no market maker.

Qmarkets – QMarkets is a new software company, and is headquartered in Tel Aviv. It is very similar to the Inkling model, with a public marketplace and quick & easy setup of subdomains on their network. The site is quite new, and there is currently little activity on the public site.

AskMarkets – AskMarkets has been developed by George Tziralis in conjunction with his PhD thesis. While currently in private beta, it will hopefully be rolling out soon.

Foresight Markets – Foresight Markets is yet another prediction market platform. While their website is up, it appears that the software is still under development.

New sites, not prediction markets, but “Wisdom of Crowds” generally

GuessNow – GuessNow is probably the most prediction market-like of all these sites, and many people might call it so. You can choose which outcome of an event you believe is most likely, and most importantly, express your confidence level. The more confidence you express, the more points you win if you’re right and the fewer points you win if you’re wrong. (In their scheme, you always win some points just for participating, even if you lose.) My only problem with the site is the number and size of the ads… it’s a little chaotic to my eyes.

Predictify – Predictify has been in the mainstream blogs a bit recently with a couple of mentions on the Freakonomics blog. Unfortunately, Predictify really isn’t a prediction market… it’s a sophisticated polling and market research mechanism. That’s not to say it doesn’t use the “wisdom of crowds,” just that some of the assumptions that James Surowiecki talks about in his book don’t necessarily apply. The reason I say it’s not a market is that a user cannot express their confidence in their prediction. It makes it difficult to sort out the knowledgeable forecasts from the un-knowledgeable forecasts. Unique about Predictify is that companies can submit market research questions, and those that predict right can win the fees that the company pays to Predictify for the listing.

Foretal – Foretal is an interesting site, and has been running for just a couple of months. It combines a Free side, where you can vote (not trade) on what you believe will happen in an event, with a Free and Cash side. Predictions that are Free and Cash have the Free/voting system running concurrently with a Cash betting system that is essentially a pari-mutuel market. You choose how many 1 Euro contracts you wish to bet on whatever options are available. (They take a 5% commission.) On the legal side, Foretal says they are based in Malta, and don’t take cash bets from the United States.

BluBet – BluBet is another site that’s not really a prediction market. It somewhat resembles a pari-mutuel betting system, where you bet on a winner and the people who successfully picked the winner split the pot. However, in this case (like others discussed in this section) there is no way to express the confidence in your bet. If you are absolutely confident in your bet, you have no way to be able to bet any more than the person who chose a random selection.

ZiiTrend – ZiiTrend is really trying to integrate a prediction market and a social network. The prediction market software is quite slick, but stretches what it means to be a prediction market. While you can specify values, like you can specify the price at which you want to trade, there is no way to vary how much you want to risk. It’s simply a vote, but a variable vote. From what it looks like, they want to focus on the social network aspect of this site, and aren’t looking to sell/licence the software.

RIP – No longer available

CrowdIQ – CrowdIQ started around the same time as Inkling, but never seemed to get traction. You can still see elements of CrowdIQ around everywhere, as ConsensusPoint uses the CrowdIQ page layout/style in their default prediction market “look and feel.”

FreeMarket – FreeMarket was developed by Jesse Gillespie, but has since taken the software down. (See here.) Essentially even though he said he couldn’t support it, he kept getting quite a number of questions and requests for help. He’s moved on in his interests, so he just took the software down. That said, I have an old copy, so e-mail me if you’re interested.


Wow, there are a lot of options out there for prediction market software, prediction market public sites, and general “wisdom of crowds” (such as idea selection and voting systems.) Whether you’re looking for software to use internally in an organisation or you’re looking for public sites where you can try different types of interaction, there are many choices for you. I hope that the list above is useful for you.

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