Steven M. Mankoff
General Partner @ TDF Ventures
San Francisco, United States
Steven M. Mankoff is a Series A investor at TDF Ventures in San Francisco focused on SaaS and Mobile. Steve is a General Partner at TDF Ventures, an early stage VC firm focused on telecom, media, technology and software. Our Partners all have extensive operating backgrounds in these sectors. We also have a permanent base of capital that allows us to be long term investors. The majority of our investments are Series A stage and we currently manage$150M. We are located in Washington DC and San Francisco, CA and focus on companies headquartered in the USA.
- Total investments:
- 6
- Last investment:
- Lead investor:
- 33%
Last updated:
For AI agents: llms.txt
Industries Steven M. Mankoff invests in
Stages Steven M. Mankoff invests in
Countries Steven M. Mankoff invests in
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
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Investment Focus
Industry
- SaaS 3 (50%)
- Mobile 3 (50%)
- Software 2 (33%)
- Enterprise Software 2 (33%)
- Apps 1 (17%)
Stage
- Series A 4 (67%)
- Series B 1 (17%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| OpsPanda helps companies identify gaps, opportunities and risks of achieving sales goals by modeling, planning, reporting and analyzing their use of sales resources. The OpsPanda SaaS application allows sales, operations and finance to define and rationalize the resources needed to meet and exceed their sales targets and the variables that affectthe performance of the sales team. Based in Palo Alto, California, OpsPanda was founded in late 2014 by veterans in Enterprise Performance Management (EPM) software. Investors include TDF Ventures, PivotNorth Capital and a leading private university. www.opspanda.com @opspandainc | $5M / Series A / Feb 09, 2016 | ||
| Stellar Loyalty is the first application provider to deliver breakthrough cloud-based, big data customer loyalty, and engagement solutions. The company's mission is to bring delight and value to every consumer experience by enabling brands to instantly recognize, engage, and reward their loyal customers across the network of digital, physical,and human interactions. Founded in 2014 and funded by InterWest Partners and TDF Ventures, Stellar Loyalty is privately held with offices in Foster City, California, Dublin, Ireland, and Manila, Philippines. | $4M / Series A / Feb 09, 2016 | ||
| Stellar Loyalty is the first application provider to deliver breakthrough cloud-based, big data customer loyalty, and engagement solutions. The company's mission is to bring delight and value to every consumer experience by enabling brands to instantly recognize, engage, and reward their loyal customers across the network of digital, physical,and human interactions. Founded in 2014 and funded by InterWest Partners and TDF Ventures, Stellar Loyalty is privately held with offices in Foster City, California, Dublin, Ireland, and Manila, Philippines. | $5M / Series A / Oct 08, 2014 | ||
| AppMesh is building the next generation business platform for mobile devices. Founded by salesforce.com veterans, we believe that in the post-PC era business applications need to be personal, seamless, and intuitive. | $3M / Series A / Sep 04, 2013 | ||
| Booker is transforming the way local services are managed by businesses and discovered by consumers. Booker replaces everything from manual methods to disconnected software, and unifies the essential components of running a service business into a single web-based platform, accessible from any device.Booker also enables service business to selltheir services online, through their website and a network of partner sites and apps, creating a seamless online booking experience for consumers. Booker processes over one million appointments each month across 70 countries. Headquartered in New York City, Booker’s customers include Fortune 500 companies as well as thousands of local service businesses.HISTORYWe started as a division of SpaFinder (located in Gramercy, NYC) in 2007 with a SaaS product called SpaBooker. Our focus was to deliver one platform for spas to manage their business, and SpaBooker was an instant success. We quickly expanded the team, feature set, and customer base. Building on our success, we decided to spin out SpaBooker to bring even more focus on growing the business by entering new verticals, and helping publishers add booking to their online user experience. We realized this vision stretched beyond the name SpaBooker, leading us to spin out as GramercyOne, with SpaBooker as its product. Shortly thereafter, we brought on new investors in our Series A financing of $14.5M, enabling us to build out our executive team, enter several new verticals, and sign new partnerships with major publishers. Over the following year, as we continued our breakout growth, we recognized that our name was creating an unneeded divide between our company and our products. We decided to bring it all together with a simple name born from our core offering – Booker. | $27.5M / Series B / Apr 17, 2013 | ||
| Booker is transforming the way local services are managed by businesses and discovered by consumers. Booker replaces everything from manual methods to disconnected software, and unifies the essential components of running a service business into a single web-based platform, accessible from any device.Booker also enables service business to selltheir services online, through their website and a network of partner sites and apps, creating a seamless online booking experience for consumers. Booker processes over one million appointments each month across 70 countries. Headquartered in New York City, Booker’s customers include Fortune 500 companies as well as thousands of local service businesses.HISTORYWe started as a division of SpaFinder (located in Gramercy, NYC) in 2007 with a SaaS product called SpaBooker. Our focus was to deliver one platform for spas to manage their business, and SpaBooker was an instant success. We quickly expanded the team, feature set, and customer base. Building on our success, we decided to spin out SpaBooker to bring even more focus on growing the business by entering new verticals, and helping publishers add booking to their online user experience. We realized this vision stretched beyond the name SpaBooker, leading us to spin out as GramercyOne, with SpaBooker as its product. Shortly thereafter, we brought on new investors in our Series A financing of $14.5M, enabling us to build out our executive team, enter several new verticals, and sign new partnerships with major publishers. Over the following year, as we continued our breakout growth, we recognized that our name was creating an unneeded divide between our company and our products. We decided to bring it all together with a simple name born from our core offering – Booker. | $14.5M / Series A / Oct 19, 2011 |
Co-Investors
About TDF Ventures
TDF Ventures is an early stage venture capital firm with offices in Washington DC and Silicon Valley. We focus on startups that serve enterprise markets within infrastructure, software, and services (IaaS, SaaS, XaaS). We invest from a $200M permanent pool of capital and are currently investing out of Fund V.
TDF Ventures Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Jim Pastoriza
General Partner
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Matthew Bressler
Principal
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Steven M. Mankoff
General Partner
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Mark Floyd
Partner
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Randy Brouckman
Partner
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FAQ
What does Steven M. Mankoff invest in?
Steven M. Mankoff invests primarily in SaaS, Mobile and Software startups, most often at Series A and Series B stage. Most of the 6 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact Steven M. Mankoff?
Public channels for Steven M. Mankoff include LinkedIn and X (Twitter). For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Steven M. Mankoff last invest?
The most recent investment recorded for Steven M. Mankoff closed in Feb 2016. Shizune tracks 6 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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