Best Link Building Agencies for SaaS in 2026: 9 US Companies, Compared With Live Data

Every "best link building agencies" list you have read was assembled the same way: the publisher put themselves at #1, sprinkled in a few names they hope you won't check, and cited no data. We publish live metrics in every list post on this site, so this one follows the same rule - every company below is US-headquartered, every link metric is pulled fresh from DataForSEO, every rating is a verified Clutch or Trustpilot figure, every price is the company's published or publicly reported rate, and the list is ordered by referring domains, the one number nobody can spin. All of it extracted July 13, 2026; all of it re-checkable by you in about ten minutes.

That ordering puts our own two entries dead last. We will take that trade, because the disclosure matters more: Saaslinks (this site) and SerpBays are both operated by Serpbays LLC of Sheridan, Wyoming. They are marketplaces, not agencies - we have included them, clearly labeled, because for many SaaS teams a marketplace is the honest answer to the question this page ranks for. Judge the models, not just the logos.

Key takeaways

• All nine companies are US-headquartered - no offshore resellers wearing a US phone number.
• Ordered by referring domains (DataForSEO, July 13, 2026), which puts the established agencies first and our own young marketplaces last.
• Published pricing spans three orders of magnitude: $60 productized packages (The HOTH) to $25,000+/month digital-PR retainers (uSERP). The spread is the single biggest reason to decide your model before you take a sales call.
• Agencies fit teams that want strategy plus execution and can commit to retainers; marketplaces fit teams that know what they need and want per-link pricing. Agencies typically add 40-100% on the raw cost of a link (full cost breakdown).
• Whoever you pick, apply the same vetting checklist: live sample links, named sourcing method, indexation or replacement terms in writing.

The short version: best by situation

• Best for content-led authority at enterprise scale → Siege Media
• Best productized/self-serve packages → The HOTH
• Best custom outreach with a published price sheet → Page One Power
• Best digital PR / top-tier placements → uSERP
• Best links-plus-full-SEO engagement → Sure Oak
• Best for regulated & high-scrutiny niches → Stellar SEO
• Best boutique value for startups → OutreachLabs
• Best per-link control without a retainer → SerpBays / Saaslinks (ours - see disclosure)

How we picked (and how to read the table)

US-headquartered only. Every company has a verifiable US HQ - Austin, St. Petersburg, Boise, Denver, Brooklyn, Nashville, Jersey City, Sheridan. That matters for contracts, time zones, and accountability, and it filters out the offshore link farms that resell the same placements at triple price.

Live data, not vibes. Referring domains come from DataForSEO's backlinks index. Traffic is DataForSEO's estimate of monthly US organic search visits. Domain registration dates come from public RDAP records. Ratings are from each company's public Clutch or Trustpilot profile. Extracted July 13, 2026 - an agency's own link profile is not proof its client work is good, but an agency that cannot build links to itself is telling you something.

Prices are published or publicly reported figures, current as of July 2026, and every engagement is ultimately custom-quoted - treat them as planning numbers, not quotes.

Company	HQ	Model	Ref. domains	US organic visits/mo	Rating	Starting price
Siege Media	Austin, TX	Agency (content-led)	5,860	30,700	4.9 Clutch (47 reviews)	custom, ~$60k+ projects
The HOTH	St. Petersburg, FL	Productized	5,291	46,800	4.0 Trustpilot (~100 reviews)	$60 packages; HOTH X $500/mo
Page One Power	Boise, ID	Agency (custom outreach)	2,299	14,200	4.8 Clutch (17 reviews)	$3,700/mo (~$600/link)
uSERP	Denver, CO	Agency (digital PR)	2,164	1,600	4.9 Clutch (21 reviews)	$10,000/mo
Sure Oak	Brooklyn, NY	Agency (full SEO)	2,039	7,700	4.9 Clutch (39 reviews)	custom quote
Stellar SEO	Nashville, TN	Agency (custom campaigns)	1,249	130	5.0 Clutch (18 reviews)	~$50k/yr contracts
OutreachLabs	Jersey City, NJ	Agency (boutique outreach)	193	600	5.0 Clutch	~$1,500 / 5 links
SerpBays*	Sheridan, WY	Marketplace (two-sided)	40	<10	- (new)	per placement
Saaslinks*	Sheridan, WY	Marketplace (SaaS-curated)	37	<10	- (new)	per placement

*Operated by Serpbays LLC - the company behind this site. Sources: DataForSEO backlinks index + Labs traffic estimates, public RDAP registration records, public Clutch/Trustpilot profiles, and each company's published pricing - all as of July 13, 2026.

1. Siege Media - content-led link earning at enterprise scale

Austin, TX · Agency (content-led) · 5,860 referring domains · domain since 2012

Siege Media does not sell links; it sells content that earns them. The agency builds data studies, calculators, and editorial assets for clients, then promotes them to publishers - the linkable-assets playbook run by a large in-house team of writers, designers, and outreach specialists. In recent years they have repositioned around AI-search visibility as well, which matters given how AI engines pick citations.

Published pricing: custom engagements; Clutch lists a $100-149 hourly band and client projects ranging from $60,000 to over $2.5M. This is enterprise content marketing with links as the output, priced like it.

Pros

• The links this model earns - journalists citing your data study - cannot be bought on any marketplace and are nearly impossible for competitors to replicate.
• 47 verified Clutch reviews at 4.9, one of the deepest public track records in the industry.
• You get a content engine and a link engine in one retainer; assets keep earning links for years.
• Fourteen-year operating history (domain registered 2012) - this is not a shop that vanishes mid-contract.

Cons

• The price of entry excludes most early-stage SaaS - if your whole marketing budget is under $10k/month, this is not your lane.
• A recurring theme in otherwise positive Clutch reviews: clients occasionally wished for more links per dollar - content-led earning is powerful but not volume-predictable.
• Results compound on a quarterly clock, not a monthly one; there is no "boost this page by March" lever.

Best for: funded SaaS companies that want links and a content moat, with patience for compounding. Skip if: you need specific pages boosted with specific anchors this quarter.

2. The HOTH - productized link building at volume

St. Petersburg, FL · Productized · 5,291 referring domains · domain since 2010

The HOTH is the biggest productized SEO shop in the US: a public price list, fixed-scope packages, and links ordered like SKUs from a dashboard. Their own numbers are the proof of scale - the largest link footprint (5,291 referring domains) and the most US organic traffic (~46,800 visits/mo) on this list.

Published pricing: entry packages from $60; managed HOTH X programs from $500/month plus a $250 setup fee. Everything is on their public pricing page - genuinely rare transparency in this industry.

Pros

• Public pricing means you can budget without a sales call, and compare line-by-line against any competitor.
• Fast, systematized delivery at any volume - useful for agencies reselling white-label links.
• Fifteen-year track record and a real US team, unusual at productized price points.
• Money-back guarantee policies on several products lower trial risk.

Cons

• Trustpilot sits around 4.0 across ~100 reviews - solid, but the lowest verified rating on this list, with the critical reviews clustering on placement quality.
• Productized outreach optimizes for repeatability, not niche relevance; for competitive SaaS keywords, placement quality decides everything.
• DA-tier packaging encourages buying by metrics that are easy to game - vet each placement's real traffic yourself.

Best for: agencies reselling white-label links; teams that want predictable pricing without calls. Skip if: you are targeting competitive SaaS money keywords where one great link beats ten average ones.

3. Page One Power - custom manual outreach, the old-school way

Boise, ID · Agency (custom outreach) · 2,299 referring domains · domain since 2011

Page One Power has run manual, relationship-based outreach since 2010 - custom campaigns, real editorial targets, and reporting that names every URL. They are one of the few large agencies that still treats guest posting and resource-page placements as craft rather than volume work, and one of even fewer custom shops that publishes its numbers.

Published pricing: campaigns from $3,700/month on a six-month minimum, which works out to roughly $600 per link; supporting content at ~$700 per article. Those published figures line up almost exactly with our 2026 pricing benchmarks for quality custom outreach.

Pros

• Published per-link economics on a custom service - you know the math before the first call.
• 4.8 on Clutch (17 reviews) with consistent praise for communication and link quality.
• Fifteen years of continuous operation; deep bench for technical and niche B2B topics.
• Reporting names every placement with date, anchor, and target - the transparency standard most agencies dodge.

Cons

• The six-month minimum means a ~$22,000 commitment before you can fully judge results.
• ~$600/link buys real editorial placements, but a SaaS team that knows its targets can source comparable placements for less via niche edits or a marketplace.
• Custom outreach is throughput-limited; monthly volume is modest compared to productized shops.

Best for: established SaaS and enterprise sites that need steady, defensible link velocity with named-URL reporting. Skip if: a $22k half-year commitment is most of your link budget.

4. uSERP - digital PR and top-tier authority placements

Denver, CO · Agency (digital PR) · 2,164 referring domains

uSERP built its name getting clients cited on sites everyone actually knows, for clients everyone actually knows - monday.com, Robinhood, and ActiveCampaign are on the public roster. This is the digital-PR end of link building, where placements double as the brand mentions that AI answers pick up - increasingly the point, given that brand-mention signals now out-predict backlink metrics for AI visibility.

Published pricing: retainers at $10,000/month (Startup, 11-13 mentions), $15,000 (Scale, 17-20), and $25,000+ (Authority, 35+), with content programs priced separately - reported figures as of mid-2026.

Pros

• Named enterprise SaaS clients and five consecutive years as a Clutch top link building company (4.9, 21 reviews).
• Placements target genuinely top-tier publications - the links that also move AI-engine visibility, not just PageRank.
• Per-mention pricing at each tier makes an expensive service unusually accountable: you can compute your effective cost per placement.

Cons

• The published entry point ($10k/month) is the highest on this list; a six-month Startup engagement with content is a six-figure decision.
• Their own domain's estimated US organic traffic (~1,600/mo) is modest relative to their profile - digital PR firms earn authority more than search traffic, but check that the same trade-off fits your goals.
• Mention counts are placements, not guaranteed dofollow links from specific domains; understand what is contracted before signing.

Best for: funded SaaS brands buying authority and AI-visibility, not link counts. Skip if: you need 15 mid-tier links a month at a working budget.

5. Sure Oak - link building inside a full SEO engagement

Brooklyn, NY · Agency (full SEO) · 2,039 referring domains · domain since 2017

Sure Oak is an SEO agency with a strong link building practice rather than a pure link shop. That is the right shape when links are one gap among several: they tie link plans to technical fixes, content strategy, and now AI-search optimization, under one accountable retainer.

Published pricing: none - custom quotes only, which makes fast budget comparison harder.

Pros

• 4.9 across 39 Clutch reviews, with over 80% of reviewers specifically praising link quality and project management.
• One partner accountable for the whole organic channel - no gaps between your link vendor and your SEO strategy.
• Strong for teams without in-house SEO leadership; strategy is included rather than billed as a separate consulting line.

Cons

• Around 10% of Clutch reviewers cite outsourced content quality and timeliness as weak spots - ask specifically who writes what.
• No published pricing; expect discovery calls before you can compare numbers.
• If you only need links, a bundled retainer means paying for strategy you may already have - a specialist or marketplace yields more placements per dollar.

Best for: SaaS teams without in-house SEO who want one accountable partner for the entire organic channel. Skip if: you have a working SEO program that just needs link volume.

6. Stellar SEO - custom campaigns for high-trust niches

Nashville, TN · Agency (custom campaigns) · 1,249 referring domains · domain since 2008

Stellar SEO runs bespoke link campaigns with an emphasis on harder, high-scrutiny niches - legal, finance, and the YMYL-adjacent corners of SaaS - where careless links do real damage and Google's spam systems are least forgiving. Smaller shop, senior attention, and the oldest domain on this list (2008).

Published pricing: custom; publicly reported annual engagements around $50,000, i.e. roughly $4,000/month.

Pros

• A perfect 5.0 across 18 Clutch reviews - reviewers repeatedly name process, knowledgeability, and transparency.
• Vetting-heavy sourcing standard: exactly what you want when a bad link is a business risk, not just wasted spend.
• Eighteen years in the game; they have operated through every major Google link update since Penguin.

Cons

• Their own site's estimated US organic traffic (~130/mo) is the lowest of the seven agencies - they rank for their niche, not at scale; judge them on client work, not their blog.
• Reported ~$50k/year engagements without published tiering - budget certainty requires a sales process.
• Small-team capacity limits parallel campaign volume for large enterprises.

Best for: SaaS in regulated or high-scrutiny spaces - fintech, health tech, legal tech - where placement diligence is the product. Skip if: you want commodity volume; that is not what you would be paying them for.

7. OutreachLabs - boutique outreach with founder-level attention

Jersey City, NJ · Agency (boutique outreach) · 193 referring domains · domain since 2022

OutreachLabs is the smallest and youngest agency here, and that is precisely why it earns a slot: we study young domains that outrank incumbents, and OutreachLabs ranks top-20 for over a hundred competitive link-building terms on a fraction of the incumbents' authority - proof of craft you can verify in any SEO tool.

Published pricing: entry packages reported around $1,500 for five editorial backlinks (~$300/link), scaling roughly linearly with budget.

Pros

• Client-approves-every-prospect model - you see and sign off each target site before outreach, the strongest brand-safety control on this list.
• ~$300/link entry economics for genuine editorial outreach undercuts every custom agency here.
• A 5.0 Clutch profile and founder-level involvement on accounts - your campaign is not handed to a junior pod.
• Its own SERP footprint (100+ competitive top-20 rankings on 193 referring domains) is a live demonstration of efficiency.

Cons

• Founded 2022: the track record is real but short, and there are no enterprise-scale case studies yet.
• Small team means limited monthly throughput and no formal enterprise SLAs.
• Fewer verified reviews than the incumbents - diligence falls back on sample links, which they will provide (here is what to check).

Best for: startups that want agency service and brand-safety control without agency overhead. Skip if: you need a large team, formal SLAs, and procurement paperwork.

8. SerpBays - the two-sided marketplace (ours)

Sheridan, WY · Marketplace · domain since 2022 · full disclosure: we operate it

SerpBays is Serpbays LLC's two-sided platform: publishers list their sites, buyers browse vetted inventory with live traffic and authority data, and the platform handles ordering, delivery, and indexation checks. No retainer and no reseller chain - the price on the listing is the price, and how a marketplace works is documented end to end.

Pricing: per placement, listed on each site's card before you order.

Pros

• Zero retainer and zero minimum - buy one link or one hundred, priced per placement.
• Every listing shows live traffic and authority metrics before purchase; you never buy blind.
• Delivery, live-link verification, and indexation tracking are built into the order flow.

Cons

• A marketplace executes your judgment; it does not replace it. If nobody on your team can judge a listing, an agency's judgment is worth its markup.
• Young platform (2022) with a small public footprint - 40 referring domains as of this pull; our credibility rides on the data we show, not the age of our logo.

Best for: teams that know what they need and want direct access to publisher inventory. Skip if: you want someone else to own strategy.

9. Saaslinks - the SaaS-curated marketplace (this site)

Sheridan, WY · Marketplace · domain since June 2026 · full disclosure: you are on it

Saaslinks is the SaaS-specific storefront of the same company: inventory curated for software and B2B relevance, every listing shown with live DR, traffic, and spam data, plus a free backlink gap audit that tells you what to buy before you spend anything. Our domain was registered in June 2026 - the youngest on this page by fourteen years, a fact we could have hidden and didn't. The metrics above come from the same API as everyone else's, which is rather the point of this list.

Pricing: per placement, listed with each site's live metrics.

Pros

• SaaS-only curation: no casino inventory wearing a marketing-blog costume - relevance is most of what makes a link work.
• Live DR, traffic, and spam-score data on every listing, from the same commercial APIs agencies use for vetting.
• The free gap audit sequences your purchases against competitors' actual link profiles, so budget goes to gaps, not guesses.

Cons

• Weeks-old platform; our own 37 referring domains sit at the bottom of this table, exactly where the data ordering put them.
• Inventory depth is growing but narrower than a generalist marketplace - by design, but a constraint if you need placements outside SaaS/B2B.

Best for: SaaS teams that want agency-grade vetting data at per-link prices. Skip if: you want a done-for-you retainer - that is what the seven agencies above are for. If you are genuinely torn, start with the marketplace vs agency comparison.

The link types these agencies actually build

"Link building agency" hides five very different services under one label. Which ones a company on this list leans on tells you as much as its price - and matching the type to your goal matters more than the logo.

• Editorial guest posts. A written article placed on a relevant site, with your link in the body. The workhorse of Page One Power, OutreachLabs, and most marketplace inventory. Full mechanics in our guest posting guide.
• Niche edits (link insertions). Your link added to an existing ranking article rather than a new post - faster and often cheaper, but you are buying into someone else's page. The HOTH and marketplaces do these at volume; here is how niche-edit pricing works.
• Digital PR. Pitching data, stories, and expert commentary to journalists for top-tier editorial coverage. uSERP's and Siege Media's specialty - the most expensive links and the ones that double as brand mentions AI engines cite.
• HARO / expert-source outreach. Answering journalist queries to earn a quote and a link. A subset of digital PR that a boutique like OutreachLabs can run cost-effectively; we cover the 2026 HARO alternatives since the original service changed hands.
• Content-led / linkable assets. Building tools, studies, and calculators that earn links passively over years. Siege Media's core model - the highest ceiling and the longest payback, detailed in our linkable assets playbook.

A marketplace like SerpBays or Saaslinks (ours) is not a sixth type - it is a different way to buy the first two, per placement instead of per retainer. The type comparison works through when each one is worth its price.

What link building costs in 2026, by model

Published and reported figures from this list, normalized - full analysis in our pricing benchmarks:

Model	Entry point	Effective per-link cost	Commitment
Productized packages (The HOTH)	$60-$500/mo	varies by tier	none-monthly
Boutique outreach (OutreachLabs)	~$1,500	~$300	per package
Custom agency (Page One Power)	$3,700/mo	~$600	6 months
Custom agency (Stellar SEO)	~$4,000/mo reported	custom	annual reported
Digital PR (uSERP)	$10,000/mo	~$750-900 per mention	6+ months
Content-led (Siege Media)	~$60k+ projects	n/a - links are earned	quarterly+
Marketplace (SerpBays, Saaslinks)	per placement	listing price, no markup on top	none

Two patterns worth noticing. First, the per-link cost of quality editorial placements converges around $300-$900 no matter who you pay - the retainer premium buys strategy and management, not cheaper links. Second, every model below ~$150/link starts trading on placements that need serious vetting.

Agency or marketplace: the honest decision rule

You are choosing who exercises judgment. An agency charges a retainer to exercise judgment for you: strategy, targets, anchors, pacing. A marketplace charges per link and leaves the judgment with you. That is the entire difference, and it is why the right answer tracks your team, not the vendor's pitch:

• No SEO owner in-house, budget over $3k/month → agency. Pick from the seven above and run the vetting checklist on your shortlist.
• SEO owner in-house, specific pages to move → marketplace. You keep the markup and the control (full comparison).
• Somewhere between → hybrid is normal: an agency or consultant sets the strategy once, a marketplace executes it monthly at per-link prices.
• Not sure how many links you even need → neither, yet. Run the numbers first: how many backlinks a SaaS site needs, then what they cost.

Whichever door you take, the red flags are identical: guaranteed rankings, "proprietary networks" that cannot be named, DA-only reporting, and links from sites whose traffic does not match their metrics. Any vendor on this list will survive those checks; plenty of vendors not on this list will not.

Methodology and sources

• Inclusion: US headquarters (verified against each company's published address), an identifiable link building practice, and a public track record we could verify. No one paid to be here; no affiliate links.
• Link metrics: DataForSEO backlinks index (referring domains) and DataForSEO Labs (estimated US monthly organic search visits), extracted July 13, 2026.
• Domain ages: public RDAP registration records, July 13, 2026.
• Ratings: each company's public Clutch profile (uSERP, Page One Power, Sure Oak, Stellar SEO, Siege Media, OutreachLabs) or Trustpilot (The HOTH), as of July 2026.
• Pricing: each company's published price list where one exists (The HOTH, Page One Power, uSERP) or credible public reporting where it does not (Stellar SEO, OutreachLabs). All custom-quoted in practice.
• Conflict of interest: Saaslinks and SerpBays are operated by Serpbays LLC, which also operates this blog. Both are labeled throughout, ordered by the same metric as everyone else, and measured by the same APIs.

We re-verify this page as data changes; the extraction date in the table is the honest timestamp.