Mantle

Mantle

Metal 3D-printed tooling for molds

Overview

Mantle3D provides metal 3D-printed tooling, focusing on high-hardness steel tools used to make molds and dies for plastic and metal parts. Their products are designed to replace or supplement traditional tooling with 3D-printed steel parts that meet tight tolerances and smooth finishes. The process blends conventional manufacturing with additive manufacturing, using flexible part geometries and optimized conformal cooling lines to produce more parts per hour, shorter lead times, and lower post-processing. This helps OEMs cut costs, accelerate development, and improve quality in production. Unlike typical tooling suppliers, Mantle3D emphasizes the combination of metal 3D printing, advanced cooling integration, and high-hardness steel to deliver precise tooling quickly. The company’s goal is to streamline manufacturing workflows for OEMs by delivering fast, cost-efficient, high-precision molds and dies that enable faster product development and higher profitability.

About Mantle

Simplify's Rating
Why Mantle is rated
B-
Rated B on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Robotics & Automation

Hardware

Industrial & Manufacturing

Company Size

11-50

Company Stage

Series C

Total Funding

$58M

Headquarters

San Francisco, California

Founded

2015

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Simplify's Take

What believers are saying

  • Tessy validated Mantle inserts for 6.8 million molded parts and weeks-faster production.
  • Mantle’s 2024 Series C raised $20 million, reaching $61.5 million total funding.
  • Angstrom offers financing and design services, lowering purchase friction for OEM toolrooms.

What critics are saying

  • Angstrom’s 2025 acquisition makes Mantle dependent on one owner’s capital allocation and priorities.
  • Industrialization still hinges on printer adoption; moldmakers can revert to conventional EDM and machining.
  • No public 2026 customer expansions or revenue milestones show Mantle beating larger tooling incumbents.

What makes Mantle unique

  • Mantle’s TrueShape mixes metal printing, CNC machining, and sintering for tooling precision.
  • Tessy Plastics ran Mantle inserts through 3.4 million cycles without wear.
  • Angstrom Group bought Mantle in 2025 and plans global scale through 41 facilities.

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Funding

Total Funding

$58M

Below

Industry Average

Funded Over

3 Rounds

Series C funding is usually for startups that are doing well and are looking for more money to fuel major growth, such as acquiring other companies, expanding into global markets, or launching new product lines. Investors typically include larger venture capital firms and private equity.
Series C Funding Comparison
Below Average

Industry standards

$50M
$40M
Figma
$50M
Medium
$62M
SeatGeek
$100M
Oura

Benefits

Competitive compensation

Equity ownership

Employer paid premium medical and dental

Paid parental leave

Commuter benefits

Growth & Insights and Company News

Headcount

6 month growth

-2%

1 year growth

0%

2 year growth

5%
Mantle
Nov 7th, 2025
ANGSTROM GROUP ACQUIRES MANTLE TO DRIVE GROWTH AND INNOVATION IN TOOLMAKING. - Mantle 3D

Angstrom Group, a leading full-service supplier to automotive and industrial OEMs, today announced the acquisition of Mantle, a San Francisco–based leader in metal 3D printing for tooling. This acquisition will expand Mantle’s reach and accelerate the adoption of its automated toolmaking technology across global manufacturing markets.

3D Adept
Nov 6th, 2025
Angstrom Group Acquires Mantle for Expansion

Angstrom Group has acquired Mantle, a leader in metal 3D printing for tooling. This acquisition aims to expand Mantle's reach and accelerate the adoption of its automated toolmaking technology globally. Angstrom will offer financing solutions and integrated tool design services to enhance the adoption of advanced metal 3D printing. The partnership will boost Mantle's production capacity and innovation, combining precision metal 3D printing with CNC machining for efficient tooling production.

TCT Magazine
Jul 10th, 2024
Mantle raises $20 million in Series C funding round

Mantle raises $20 million in Series C funding round.

VCNewsDaily
Jul 10th, 2024
Mantle Secures $20M Series C Funding

Mantle has secured $20 million in Series C funding, led by Schooner Capital, with participation from Fine Structure Ventures, Foundation Capital, Corazon Capital, 11.2 Capital, and Build Collective. This brings the company's total funding to over $61.5 million.

3DPrint.com
Apr 19th, 2023
3D Printing News Briefs, April 19, 2023: Movie Magic, Distribution Agreement, & More

Mantle introduced a High-Precision Shaping package, and Essentium released a high-impact, high-temperature thermoplastic.

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