When was Sierra Angels founded?

Sierra Angels was founded in 1997.

Where is Sierra Angels' headquarters located?

Sierra Angels' headquarters is located in Reno (United States).

How many companies has Sierra Angels invested in?

Sierra Angels has invested in 22 companies, including Aperia Tech & Membrion.

Which companies has Sierra Angels invested in lately?

MessageDesk & Your Fare are the latest investments by Sierra Angels.

What sectors does Sierra Angels focus on for investments?

Top sectors in Sierra Angels' portfolio are Enterprise Applications (11 investments) and Food and Agriculture Tech (3 investments).

How many exits has Sierra Angels been involved in?

Sierra Angels' portfolio has seen 1 IPO and 2 acquisitions.

Sierra Angels - 2026 Investor Profile, Portfolio, Team & Investment Trends

Sierra Angels, established in 1997, is an angel investment group based in Reno, United States. It primarily focuses on Seed investments in companies in United States. Its portfolio includes 22 firms, spanning the Enterprise Applications, Food and Agriculture Tech sectors. Its most notable investments include companies like Aperia Tech, Membrion and Gluware. As of Oct 2026, Sierra Angels has witnessed 3 portfolio exits. Its latest investment was a $1.6M Seed round in MessageDesk on Sep 06, 2023, which also saw participation from Reno Seed Fund and AZ-VC.

To date, 41 investors have co-invested in Sierra Angels's portfolio companies, including prominent names like Sacramento Angels.

Key Metrics

Founded Year

1997

Location

Reno, United States

Portfolio Companies

Aperia Tech, Membrion & 20 more

Sectors of Investment

Enterprise Applications, Food and Agriculture Tech & 15 more

Stages of Investment

Seed, Series A & 2 more

Locations of Investment

United States

View Sierra Angels's full profile

Sierra Angels has a portfolio of 22 companies. Their most notable investments are in DynaOptics and Gluware.Their portfolio spans across and United States. They have invested in Enterprise Applications, Food and Agriculture Tech, High Tech and 14 other sectors, across stages such as Seed, Series A and 2 more. Here is the list of top investments by Sierra Angels:

1. Aperia Tech

Platform providing tire inflation monitoring solutions for trucks and trailers. It develops a tire inflation monitoring device installed on vehicle wheels to detect pressure levels and enable preventive maintenance. The technology is designed for fleet owners aiming to reduce maintenance costs and improve fuel efficiency.

Key facts about Aperia Tech

Founded Year: 2010
Location: Burlingame (United States)
Stage: Series D
Total Funding till date: $150M
Employee Count: 157 as on Sep 30, 2026
Investors: For Good Ventures, Birchaven Group and 14 Others
Latest Funding Round: Series D, Mar 21, 2023, $*****
Highlight: Editors' Pick

2. Membrion

Developer of membranes for the flow battery market. The company is engaged in the development of high-performance membranes to reduce the cost and improve the performance of flow batteries. Its first membrane is built for redox flow batteries, other potential use cases include pharmaceutical purification, fuel cells, and reverse osmosis.

Key facts about Membrion

Founded Year: 2016
Location: Seattle (United States)
Stage: Series B
Total Funding till date: $55.2M
Employee Count: 34 as on Sep 30, 2026
Investors: Samsung Venture Investment, Washington Research Foundation and 25 Others
Latest Funding Round: Series B, Jun 16, 2025, $*****
Highlight: Editors' Pick

3. Gluware

Multi domain network automation and orchestration solution. It allows automation of the process of network lifecycle management. Their network orchestration engine enables software defined networking from a data center to LAN and WAN. Currently powers mission-critical networks of blue chip enterprises and managed service providers.

Key facts about Gluware

Founded Year: 2007
Location: Sacramento (United States)
Stage: Acquired
Total Funding till date: $70.5M
Employee Count: 51 as on Sep 30, 2026
Investors: Bain Capital, The Angels’ Forum and 8 Others
Latest Funding Round: Series B, Oct 27, 2021, $*****
Highlight: Acquired

4. TranscribeMe

TranscribeMe makes audio content searchable and shareable, by converting speech to text, using a hybrid software and a crowd-sourced platform. For complex audio with multiple speakers, overlapping conversations, ambient noise, or subject-specific jargon, the company claims to produce a 99% accurate, speaker identified transcription, using their proprietary micro-tasking technology which allows pieces of audio to be processed in parallel. The company's target market includes enterprises, conferences, writers, podcasters, and academics who gain value from the ability to analyze, search, share and monetize their content. Clients and partners include Facebook, Bose, Medallia, Genesys, KMR, Kaplan, Deloitte, Genesys, Cisco, Oracle etc.

Key facts about TranscribeMe

Founded Year: 2011
Location: San Francisco (United States)
Stage: Series A
Total Funding till date: $9.6M
Employee Count: 1,104 as on Sep 30, 2026
Investors: Wilmington Investor Network, Point Reyes Management and 15 Others
Latest Funding Round: Series A, Jul 27, 2016, $*****
Highlight: Editors' Pick

5. Axiom Exergy

Thermal battery system for Commercial power consumers. The platform provides turnkey energy-management solutions that reduce operational costs and business risk for supermarkets and commercial buildings with high refrigeration-based energy loads. The primary product is a solution that uses existing refrigeration systems in a commercial building or supermarkets to store thermal energy during off-peak hours and deploys it during peak hours. As a result, electricity demand is claimed to be reduced by up to 40 per cent during peak hours. The Refrigeration Battery provides both load-shifting that offsets costly on-peak electricity charges and on-demand backup cooling when power fails. The solution is controlled through backend software which optimizes the Refrigeration Battery’s charge cycle by storing refrigeration when energy costs are lowest and providing cooling services at peak consumption periods.

Key facts about Axiom Exergy

Founded Year: 2013
Location: Berkeley (United States)
Stage: Series A
Total Funding till date: $10.1M
Employee Count: 20 as on Dec 31, 2022
Investors: WorldQuant Ventures, StartX and 13 Others
Latest Funding Round: Series A, May 09, 2018, $*****
Highlight: Editors' Pick

View the full list of portfolio companies

Sierra Angels has invested in 22 companies over the last 19 years, with an average of 1 new investment annually in the last 10 years. Its most recent first time investment was in MessageDesk and most recent follow-on round was in Mariah Power.

Here are Sierra Angels' Year-on-Year Investment Trends:

Year	No. of Investments
Year	1^st Round	Follow-on	Total
2026 (YTD)	0	0	0
2025	0	0	0
2024	0	0	0
2023	1	0	1
2022	0	0	0
2021	0	0	0
2020	1	0	1
2019	1	0	1
2018	1	0	1
2017	1	0	1

View all investments by Sierra Angels

Sierra Angels has made 13 investments in Seed stage with an average round size of $1.67M, 4 investments in Series A stage with an average round size of $4.38M, 2 investments in Angel stage with an average round size of $2.26M and 1 investment in Series B stage.

Here are Sierra Angels' investments by stage:

Stage of entry	No. of Investments
Seed	13
Series A	4
Angel	2
Series B	1

Note: We have considered here, only first round of investments

View all investments by Sierra Angels

Sierra Angels has a diverse portfolio, with companies operating in the Enterprise Applications, Enterprise Infrastructure, Food and Agriculture Tech, High Tech and Sustainability Tech. Notably, it has invested in 18 Enterprise (B2B) companies, 17 Tech companies, 9 Software companies and at least 7 companies focusing on Saas.

Here are Sierra Angels' investments by sector:

Sector	No. of Investments
Enterprise Applications	10
Enterprise Infrastructure	4
Food and Agriculture Tech	3
High Tech	3
Sustainability Tech	3
Others	18

Note: We have considered here, only first round of investments

View all investments by Sierra Angels

Sierra Angels has made most investments in United States (20).

View all investments by Sierra Angels

Sierra Angels has not made any investment in 2026 so far.

Here are the most recent investments by Sierra Angels:

Filter this list

Date	Company	Location	Round Details	Round Amount	Co-Investors
Sep 06, 2023	MessageDesk	United States	Seed	4186	Reno Seed Fund [+4]
Feb 13, 2020	Your Fare	United States	Seed	9829	Band of Angels [+3]
Aug 18, 2019	Tivic Health	United States	Seed	8268	Sand Hill Angels [+5]
Dec 07, 2018	Membrion	United States	Seed	1350	E8 [+2]
2017	SkillMil	United States	Seed	1350	Sand Hill Angels [+2]

See more recent investments made by Sierra Angels

1 of Sierra Angels' portfolio company became public - Tivic Health. It got listed on the National Association of Securities Dealers Automated Quotations (NASDAQ), in Nov 2021 at marketcap of $46.3M

Here are Sierra Angels' portfolio companies that went public:

Filter this list

Company	IPO Date	First Invested on	First Round of Investment	Round Size
Tivic Health	Nov 11, 2021	Aug 18, 2019	Seed	3247

View more details about public companies in Sierra Angels' portfolio

2 companies from Sierra Angels' portfolio have been acquired. The most recent acquisition was Gluware in Jan 2025 by Cuadrilla Capital for $*****.

Here are Sierra Angels' portfolio companies that got acquired most recently:

Filter this list

Company	Acquisition Date	First Invested on	First Round of Investment	Round Size
Gluware	Jan 08, 2025	Mar 03, 2011	Series A	1774
Windspire Energy	Aug 27, 2012	Dec 08, 2008	Series B	7654

View all acquired companies in Sierra Angels' portfolio

Sierra Angels has a team of 2 members located in United States. Sierra Angels' team does not sit on the board of any company as of now.

View team details of Sierra Angels

Over the past 19 years, 81 investors have co-invested in Sierra Angels's portfolio companies. This includes funds and angels.

Invested before Sierra Angels: E8, America’s Seed Fund and 2 others have invested in rounds before Sierra Angels. There is 1 company where E8 has invested before Sierra Angels and 1 company where America’s Seed Fund has invested before Sierra Angels.
Top Co-investors of Sierra Angels: 41 investors entered a company along with Sierra Angels. These include investors like Sacramento Angels (8 companies).
Invested after Sierra Angels: A total of 36 investors have invested in Sierra Angels's portfolio after their investments. Top Investors include Greenhouse Capital Partners (2 companies) and Blackhorn Ventures (1 company).