The mobile push notification service Urban Airship today announced that it raised $25 million in another round of funding. The latest funding round was led by August Capital, which joined as the newest investor. Existing investors including Intel Capital, True Ventures, Foundry Group and Verizon also joined in on the new funding round.

The Portland-based mobile push messaging provider’s last round of funding came in late 2011, raising $15.1 million from Salesforce and Verizon. Urban Airship’s total funding now stands at $46.6 million.

The new influx in cash flow will be used to expand its existing teams, especially marketing, in the company’s various offices and to speed up the launch of its mobile push messaging and Apple Passbook management services to major brands. Urban Airship will also use the new funds to grow its push notification platforms and expand its operations internationally.

Urban Airtship co-founder and CEO Scott Kventon said in a statement that the company quadrupled both its revenue and push volumes in 2012.

Lastly, August Capital’s co-founder John Johnston will join Urban Airship’s board of directors.