Pairing artificial intelligence and the blockchain might be what you would expect from a scammer looking to make a quick buck in 2018.

The two concepts, after all, are two of the most buzzed about and least understood ideas in the tech universe.

And the blockchain, the database design introduced by bitcoin, has lately been the most popular route for anyone looking to raise money for an idea that sounds too good to be true.

Despite how easy the combination is to mock, the idea of applying the blockchain to AI is attracting a growing roster of serious entrepreneurs and venture capitalists, many of them with impressive academic credentials.

Dawn Song, a computer science professor at UC Berkeley, and Ben Goertzel, the chief scientist at Hanson Robotics, have been among the big names arguing that the blockchain could be a crucial way to push back against some of the most worrying trends facing the field of artificial intelligence.

Many AI experts are concerned that Facebook, Google and a few other big companies are hoarding talent. They also control huge troves of online data that are necessary to train and refine the best machine learning programs.

Song, Goertzel and other entrepreneurs say they believe blockchain could encourage a broader distribution of the data and algorithms that will determine the future development of AI.

“It’s important to have machine learning capabilities that are more under the user’s control, rather than relying on these big companies to get access to these capabilities,” Song said.

The startups working toward this goal are applying blockchains in a number of ways. At the most basic level, just as the blockchain allows money to be moved around without any bank or central authority in the middle, AI experts are hoping a blockchain can allow artificial intelligence networks to access large stores of data without any big company controlling the data or algorithms.

Several startups are setting up blockchain marketplaces, where people can buy and sell data.

Ocean Protocol, a project based in Berlin, is building the infrastructure so that anyone can set up a marketplace for any kind of data, with the users of data paying the sources with digital tokens.

Unlike Google and Facebook, which store the data they get from users, the marketplaces built on Ocean Protocol will not have the data themselves; they will just be places for people with data to meet, ensuring that no central player can access or exploit the data.

“Blockchains are incentive machines — you can get people to do stuff by paying them,” said Trent McConaghy, one of the founders of Ocean Protocol, who has been working in AI since the 1990s.

The goal, McConaghy said, is to “decentralize access to data before it’s too late.”

Ocean is working with automakers to collect data to help create the AI of autonomous cars. All the automakers are expected to share data so none has a monopoly.

Another startup, Revel, will pay people to collect the data that companies are looking for, like pictures of taxis or recordings of a particular language. Users can also let their phones and computers be used to process and categorize the images and sounds — all in exchange for digital tokens. Over a thousand people already have put their computers to work.

These sorts of marketplaces are only the outer layer of the blockchain systems that are being built to handle AI data.

One of the biggest concerns that people have about the data being collected by Google and Facebook is the access it gives these companies to the most private details of our lives.

Song is working on a blockchain, known as Oasis, that will use advanced techniques to secure the data being bought and sold, so that no one — not even the company using the data — will get a copy of it.

In the Oasis network, all data moving through the system will be locked into encrypted bundles. Researchers will be able to run the data through their machine learning algorithms — and prove that the calculations were done correctly — without ever actually seeing the underlying data.

One project building on top of Oasis, known as Kara, will allow medical researchers looking at the behavior of specific diseases to train their machine learning models with data from actual patients, without the data ever being exposed.

Oasis has already raised $45 million from several big-name venture capital firms, but they have competition from another startup created by researchers from the Massachusetts Institute of Technology, called Enigma.

Enigma got started before Oasis and is working with partners like Ocean Protocol to ensure that people contributing data to marketplaces can set the exact terms under which their data can be used.

Other startups are using blockchains to open access to the AI models themselves. Goertzel has created SingularityNET, a blockchain that will serve as a link among AI services around the world. If one AI module is unable to come up with an answer, it can consult with others, and provide compensation if one of the other modules is able to get it right.

Hanson Robotics is planning to use SingularityNET to feed information into its humanoid robot, Sophia. Unlike Amazon’s Alexa service, which answers questions using services approved by Amazon, Goertzel wants Sophia to reach out to other AI providers if she can’t find the right answer.

Nathaniel Popper is a New York Times writer.