The world's biggest search engine, Google is acquiring Silicon Valley startup Meebo which assists online publishers to increase their websites more social. 

The acquisition announced Monday will bring more tools to Google Plus, an alternative to Facebook. Founded in 2005, Meebo began as a browser-based instant messaging client, growing to include the Meebo Bar, which allowed users to chat on various websites like TV Guide, TMZ, and Entertainment Weekly. 

It has since built other communications features that are now used by about 100 million users in the US. Both companies are based in Mountain View, California.

"Together with Google, we're super jazzed to roll up our sleeves and get cracking on even bigger and better ways to help users and website owners alike," Meebo wrote Monday on its blog.

A Google spokesman said the company is always looking for better ways to help users share content and connect across the web, as in daily life.

“With the Meebo team's expertise in social publisher tools, we believe they will be a great fit with the Google+ team,” the company said.

"We look forward to closing the transaction and working with the Meebo team to create more ways for users to engage online."

Terms of the acquisition were not disclosed. But tech blog All Things D first reported rumours about a Google-Meebo acquisition in May with an alleged asking price of about $100 million.

Meebo has raised $70 million in venture capital since its inception in 2005.

Since from the end of 2009 Google Inc. has spent as more than $16 billion in buying 140 companies.In Google's 14-year history the biggest deal is $12.5-billion possession of cellphone maker Motorola Mobility.