Salt Lake City, UT

Third Sun

Reach 21.2PageRanker 65

Third Sun is a web design company based in Salt Lake City, UT, in business since 2005. Its own home page scored 59 for mobile speed and 98 for access in our lab test on October 25, 2026, faster than 234 of the 450 firm sites we tested. Its websbz Score is 79.6 out of 100. Its Reach, a separate score, is 21.2.

Visit thirdsun.com See the Score

Our Read

Third Sun is a small Salt Lake City studio that designs websites and brands, mostly for nonprofits and local small businesses. Troy Mumm and Jocelyn Kearl started it in 2005. The team also runs monthly trainings so clients can manage their own sites.

What sets them apart. It hosts staff trainings and workshops for clients and has given dozens of websites in kind to Utah nonprofits.

Best for. Utah nonprofits and small businesses.

Services

Web designBrandingGraphic designMarketingNonprofit toolsTraining and support

Industries

NonprofitsSmall businessArts and culture

Our Lab Test of thirdsun.com

Mobile emulation, tested October 25, 2026. One run from our desk. Field data from real visitors can differ.

59Performance

98Accessibility

100Best Practices

92SEO Basics

Largest paint: 11.3 seconds
First paint: 3.4 seconds
Blocking time: 321 ms
Layout shift: 0.000
Page weight: 2.1 MB
Requests: 57

Proof of Work

Limelight RainforestNonprofit portfolio project
Switchpoint Community Resource CenterNonprofit portfolio project
Meta DesignsSmall business portfolio project
Mountain West CiderSmall business portfolio project
Utah Arts Festival 2024Nonprofit portfolio project
Salt Lake Acting CompanyNonprofit portfolio project
SLC Mosquito Abatement DistrictGovernment portfolio project
University Press of ColoradoEducation portfolio project

Clients They Name

Utah Brewers GuildUniversity of Utah College of Fine ArtsThe State Room PresentsOgden Friends of Acoustic MusicUtah Global DiplomacyAssociation of Nature Center AdministratorsLimelight RainforestSwitchpoint Community Resource CenterMeta DesignsMountain West CiderUtah Arts Festival 2024Salt Lake Acting CompanySLC Mosquito Abatement DistrictUniversity Press of ColoradoTreeUtahEgyptian Theatre in Park City

Work

No verified client sites yet. Firms can submit their sites. We show and count only the ones whose live footer names the firm. Send your sites.

Signed Work

signed client sites found so far

We have not yet found a live client site with a Third Sun footer credit in our crawl of local business sites. Studios that sign their work, like Website by Third Sun, can claim this profile and send us the sites to count.

Search Authority

PageRanker Score, link authority from 0 to 100

The PageRanker Score reads the public link graph of the whole web. How it works.

websbz 2025 Look Back

Rank 3 with a Look Back score of 78.5 out of 100. Scored in October 2026 from 2025 archived copies of each firm’s site. It is a separate list and does not change the 2026 websbz Score.

Proof 24 of 30, openness 12 of 20, tenure 15 of 15, scaled to 100. Home page copy saved July 10, 2025. See the 2025 copy. Read the Look Back.

websbz 2025 Look Back, Rank 3. Scored in October 2026 from 2025 archived copies of each firm’s site.

2025 Look Back, Rank 3
WB-595WC

<a href="https://websbz.com/firm/thirdsun/" title="websbz 2025 Look Back, Rank 3. Scored in October 2026 from 2025 archived copies of each firm’s site."><img src="https://websbz.com/seal/WB-595WC.svg" width="120" height="120" alt="websbz 2025 Look Back, Rank 3. Scored in October 2026 from 2025 archived copies of each firm’s site."></a>

Reviews

No reviews yet. Worked with Third Sun? Be the first.

Reviews post right away after a spam and clean language check. See one that breaks the rules? Report it. Reviews and votes never change the websbz Score.

websbz Score

79.6websbz Score

Own Site QualityOur lab test of the firm’s own home page. Speed counts most, then access, then build and search basics.28.6/35
Proof of WorkNamed projects, named clients and awards the firm lists, plus live client sites we found carrying its credit.24/30
OpennessDoes the firm publish a street address, a phone, its founding year, its team size and a starting price.12/20
TenureYears in business, from a founding year the firm states. Twenty years earns the full share.15/15

How the score works

Reach

21.2

out of 100. How far the work reaches, kept apart from the websbz Score

Verified client sites0/40none verified yet
Named clients10/1016 named clients
Client scale2/101 named client with a Wikipedia page
Offices2.5/101 office
Countries0/101 country
Team size0/12not published
Years6.7/8founded 2005

How Reach works. A fact the firm does not publish counts as zero.

Facts

Website: thirdsun.com
Headquarters: Salt Lake City, UT
Country: United States
City ranking: Best Web Design Companies in Utah
Address: PO Box 521981, Salt Lake City, Utah 84152
Phone: 801-649-3598
Founded: 2005

Where They Rank

Best Web Design Companies in Utah#4 of 17
Best Web Designers in the United States#27 of 282
Best Web Design Companies in the World#42 of 450

Show This Seal

Every award comes with a free seal hosted by websbz. It links back to this page, so anyone can check it is real.

<a href="https://websbz.com/firm/thirdsun/" title="websbz Noted 2026, Ranked in Utah"><img src="https://websbz.com/seal/WB-TBE7U.svg" width="120" height="120" alt="websbz Noted 2026, Ranked in Utah"></a>

Claim This Profile

Not claimed yet. If you run Third Sun, claim it to send corrections and signed sites. It is free.

Claim Third Sun

Add this tag inside the head of the home page at thirdsun.com. Your websbz seal on the home page works too.
```
<meta name="websbz-verify" content="wbz-0a1e193c3d">
```
Publish the change so it is live.
Verify below. We read your home page once and look for the tag.

Send Your Client Sites

Sites that carry your credit in the footer. We load each one and show only the sites whose live footer names Third Sun. Demo and staging addresses never show.

Where This Came From

Pages we read on October 24, 2026.

Is something wrong or out of date? Send a correction. It is free.

The Third Sun Award, in Hand

How the Noted award looks off the screen. Made to order for winners, ask about one from the contact form.

Framed certificate
A signed certificate in a black frame for the studio wall.
Acrylic award
A clear block with the seal etched in, for a desk or a shelf.
Wall plaque
Brushed champagne metal on walnut, engraved with the award.
Window decal
A round seal for the front door or the office glass.