Plastiq, a Boston-based online payments company, has raised $6 million in financing. The round was led by Atlas Venture and Flybridge Capital Partners and also included investors in an earlier, $2.3 million financing sewn up last spring. Those other investors include NextView Ventures, Greenoaks Capital Management and individual investors such as Harvey Golub, the former chairman and CEO of American Express.

Email technology provider PowerInbox has merged with ActivePath, a provider of interactive email technology within the enterprise space. PowerInbox is based in Cambridge, Ma, and ActivePath is based in New York, with offices in Tel Aviv, Israel. The combined entity will have $10 million in funding from Atlas Venture, Longworth Venture Partners, Battery Ventures, Genesis Partners, GIMV NV and Correlation Ventures.

Biotechnology company Nimbus Discovery has appointed Daniel Lynch has been appointed to the company’s board of directors as executive chairman. Lynch will succeed Bruce Booth, D. Phil., partner at Atlas Venture and co-founder of Nimbus, who will remain on the board. Nimbus is backed by life science investors including Atlas Venture, SR One, Lilly Ventures and Gates Ventures.

Secret Escapes, an online luxury travel club, has secured 8 million pounds ($12.9 million) of new funding. Index Ventures led the funding round with participation from existing investors Octopus Ventures and Atlas Venture. Torch Partners advised Secret Escapes on the fundraising.

strong>Veracode, a cloud-based application security testing company, has acquired the assets of Marvin Mobile Security, a developer of a mobile application analysis service for enterprises, app stores and mobile carriers. Terms of the deal were not disclosed. Veracode is backed by Meritech Capital Partners, Atlas Venture, .406 Ventures and StarVest Partners.

Stratus Technologies has acquired the assets of Marathon Technologies Corporation, a privately held developer of application availability solutions based in Littleton, MA. Longworth Venture Partners, Sierra Ventures and Atlas Venture are backers.

Cambridge, Mass-based Ubersense has raised $1.1 million in seed funding. Atlas Venture, Google Ventures, Boston Seed Capital and various prominent angel investors have backed the sports technology company.

DisplayLink®, a provider of solutions that simplify the connection between monitors and computing devices, has closed $10.4 million of growth financing. The financing was led by Clydesdale Bank’s Growth Finance team. Existing investors Atlas Venture, Balderton Capital, Cipio Partners, DAG Ventures, and DFJ Esprit also contributed to the equity funding. The Palo Alto-headquartered company will [...]

SimpleTuition, a provider of interactive tools that help students save on college-related expenses, has acquired ValoreBooks, an online textbook marketplace which offers discounts on new and used textbooks as well as rentals. SimpleTuition is headquartered in Boston, Mass, and is funded by Atlas Venture, Flybridge Capital Partners, and North Hill Ventures. PRESS RELEASE SimpleTuition, Inc., [...]

Notion Capital, an entrepreneur-backed venture capital firm with a focus on cloud computing and Software-as-a-Service, has made its first investment from the recently closed $100 million, Fund 2. The fund has made a 2 million pounds ($3.1 million) investment in The Currency Cloud, a provider of a cloud-based currency conversion and international payments service. The [...]