TechStars Boston, one of the area’s premier start-up accelerators, announced its 2013 class, including companies that provide new options for urban agriculture, crowdsourced fashion, and a company that promises “brains for bots.”

Katie Rae, who oversees TechStars Boston with Reed Sturtevant, announced the participants Monday evening in a blog post.

Two of the start-ups have had at least some previous coverage on Boston.com: Jebbit, which Scott Kirsner wrote about when the company netted a $29,000 investment in October, and Freight Farms, which was the subject of a longer Kirsner profile on BostonGlobe.com as well as featured on The Hive’s Innovator series and embedded here:

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“The founders bring a fantastic level of drive, knowledge, enthusiasm and tenacity that I know will make great businesses,” Rae wrote. “Many of the companies are from the Boston area but we also have teams from Washington, DC, Austria, France, and the Ukraine.”

The companies and TechStars’ descriptions of them:

CheckiO

An interactive and educational game and competition platform for developers.

Codeship

A hosted continuous integration and deployment platform.

CONSTRVCT

A crowd-sourced fashion label, where anyone can create and sell their unique designs with our 3D design tools, custom fit, and on demand production.

coUrbanize

Helps communities and developers build better real estate projects.

Fancred

A new social app for sports fans.

Freight Farms

A scalable farming platform can be installed anywhere and operated by almost anyone, transforming shipping containers into a source for high yield crop production.

Jebbit

Jebbit’s pay per performance model benefits both brands and consumers, guaranteeing a brand that their message is comprehended while rewarding consumers with cash for actively answering questions that educate them on the brand.

LinkCycle

LinkCycle helps manufacturers manage resource consumption across product lines to reduce costs without any extra hardware or data collection.

Neurala

We build brains for bots.

Outline

Using advanced economic modeling and data visualization to improve government transparency, efficiency, and performance.

PillPack

Pharmacy simplified.

qunb

A “YouTube for numbers,” a platform that makes data broadcasting and data visualization accessible to anyone.

Rallyt

Helps organizations achieve their goals by connecting and engaging communities around meaningful actions.

Synack

Redefining vulnerability discovery.