San Francisco's artificial intelligence industry is pulling in lots of new investment, with 21 local companies securing venture capital funding in recent weeks.

New funding rounds were recently announced by artificial intelligence companies Blueshift, Labelbox, Prisma Labs and VCV, according to company database Crunchbase.

Blueshift topped the city's recent funding headlines by announcing a $15 million Series B round on April 23, led by Softbank Ventures Asia.

According to its Crunchbase profile, "Blueshift is an AI-powered customer engagement platform for B2C marketers and cross-channel marketing. Using the power of real-time segmentation and dynamic-content personalization, the platform enables marketers to automate Segment-of-One Marketing across multiple channels including email, push notifications, Facebook and SMS. Blueshift was founded in 2014 and is headquartered in San Francisco, CA, USA."

The five-year-old company has raised two previous funding rounds, including an $8 million Series A round in 2016.

Next up, Labelbox raised $10 million in Series A funding, in a round announced on April 9 and led by Gradient Ventures.

According to Crunchbase, "At Labelbox, we’re building a platform to accelerate the development of this future. Rather than requiring companies to create their own expensive and incomplete homegrown tools, we’ve created the world’s first training data platform that acts as a central hub for humans to interface with AI. When humans have better ways to input and manage data, machines have better ways to learn."

The company also raised a $3.9 million seed round in 2018.

Meanwhile, Prisma Labs raised $6 million in Series A funding, announced on May 2. The round's investors were led by Haxus.

From the company's Crunchbase profile, "Prisma Labs developed an app which became the #1 app in both AppStore and GooglePlay in 2016, with over 100 million downloads worldwide. It gives photos the look of famous paintings, ornaments and patterns. A unique combination of neural networks and artificial intelligence helps people to turn memorable moments into timeless art."

Prisma Labs last raised seed funding in 2016.

Also of note, speech recognition company VCV raised $1.7 million in seed funding, announced on April 23 and led by Will Group.

From Crunchbase, "VCV is an AI-powered recruiting bot that searches for candidates, calls them with questions using voice recognition and then invites them to record a video interview. VCV can save recruiters over 20 hours of work, with recruiting bots working 24/7 to find, chat and interview."

The company previously raised $150,000 in seed funding in 2017.

In total, San Francisco-based artificial intelligence companies have raised $258 million in venture funding over the past month, and $1.8 billion over the past year.

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