Fleishman Hillard is one of the most established global PR agencies, founded in 1946 and now part of Omnicom Group Inc. (NYSE: OMC). With clients in more than 80 countries and a dedicated division for emerging companies, Fleishman Hillard is suited to startups that require global market access and multi-market communications strategy from a single agency relationship.

Fleishman Hillard specialises in strategic communications, digital marketing, social media, and influencer campaigns. Their strength lies in connecting brands with consumer audiences at scale across digital channels. The agency takes time to understand business goals and target audiences before building campaigns. Note that as a large network agency, costs are substantially higher than boutique alternatives and results are not guaranteed.

Edelman is the world's largest independent PR agency, with over 85 offices across more than 40 countries. Known for its integrated communications model — combining digital, advertising, media relations, and public affairs — Edelman has been named the "Most Creative PR Firm" by The Holmes Report for seven consecutive years. The agency is data-driven, with strong measurement and analytics capabilities across all campaigns.

For startups, Edelman is best suited to Series B and later-stage companies that require enterprise-level brand strategy, crisis communications, and multi-market media coverage. Their fees are among the highest in the industry, making them less accessible for early-stage startups with constrained marketing budgets.

Weber Shandwick is a global communications agency with offices in all major media, business, and government capitals worldwide. The agency represents a diverse client base spanning Fortune 500 companies, non-profit organisations, startups, and government entities. Their integrated teams combine strategic counsel, creative thinking, and deep industry knowledge to deliver communications that achieve business objectives.

Weber Shandwick's key differentiator is its breadth of industry expertise and its ability to execute complex multi-stakeholder communications strategies. For startups operating in regulated industries or requiring government affairs alongside PR, Weber Shandwick offers a comprehensive service. Like other large agencies, they work best with startups that have established funding and significant marketing budgets.

Bob Gold & Associates is an independent, data-driven PR agency founded in 1997, with offices in New York City, Chicago, and Southern California. The agency's proprietary BG&A Insight™ methodology uses data analysis to create media strategies tailored to each client's specific goals and audience — a SMART approach: Specific, Measurable, Achievable, Replicable, and Timely.

Bob Gold & Associates specialises in Media & Entertainment, Technology, Social Good, AdTech, and Crisis Management. The agency is well suited to startups in these verticals that require a personalised, insight-led approach rather than the broad-brush strategies of larger agencies. Their crisis management capability is a particular strength for startups operating in high-scrutiny sectors.

Pollack PR Marketing Group is a bicoastal agency founded in 1985, with offices in New York and Los Angeles. The agency is a member of The Worldcom Public Relations Group, providing access to 2,000 communicators worldwide. Pollack PR is known for its practical, focused approach — prioritising clear communication over jargon — and is particularly strong in consumer brand and lifestyle PR.

The agency has developed specialisation in Gen Z and millennial marketing, making it a strong choice for consumer startups targeting younger demographics. Services include media relations, influencer marketing, social media, and generational marketing strategies. Their bicoastal presence is valuable for startups launching in multiple US markets simultaneously.

Harris Public Relations is a boutique, purpose-driven PR agency with over 23 years of experience specialising in arts and culture, community, business, and lifestyle PR. The agency generates newsworthy stories via both traditional and digital media, and maintains a strong network of partnerships with media outlets and community organisations.

Harris PR's core strength is thoughtful brand storytelling and authentic community engagement. They are well suited to startups in the creative industries, lifestyle, social enterprise, and cultural sectors that require a hands-on, personalised approach. Services include thought leadership, strategic communications, red carpet and event management, media training, and community relations outreach.

TrizCom PR is a full-service PR and communications agency with a strong record in startup and entrepreneur PR, corporate communications, and non-profit work. The agency won the 2022 Pegasus Award for their work with Operation Kindness and Intuitive Health. TrizCom PR's approach centres on collaboration, with the agency positioning itself as an integrated member of the client's team rather than an external vendor.

TrizCom offers an unusually comprehensive suite of services for a firm of its size: digital PR, analyst relations, charitable giving strategy, community relations, content creation, crisis communications, entrepreneur and startup PR, event planning, influencer management, investor relations, legislative affairs, media relations, reputation management, and social media management.

Vitis PR is a UK-based agency specialising in B2B tech PR, serving technology, telecoms, and high-growth companies from startups to listed enterprises. The agency's team includes account directors, managers, associates, and writers, and has earned coverage for clients in both specialist and mainstream media — online and offline.

Vitis PR is the strongest option on this list for B2B tech startups targeting UK and European markets, particularly those in enterprise software, telecommunications, and emerging technology. They work with both short-project and long-term clients globally, and develop tailored communications campaigns aimed at business users and consumers depending on the client's market.

NOW!PR, established in 2000 and part of the BPRESS group, is an Italian PR consultancy focused on "Awareness Driving Action" — translating media coverage into measurable commercial outcomes. The agency operates across Corporate & Finance, Tech & Innovation, and Travel & Lifestyle sectors, and offers integrated communications spanning media relations, digital PR, events, social media, influencer marketing, and corporate blog development.

NOW!PR is a strong option for European startups requiring integrated communications that connect PR activity directly to business results. Their strategic communications consultancy provides a structured approach to brand positioning, while their digital PR and influencer capabilities ensure coverage reaches the right audiences on the right platforms.

Ketchum is a global PR agency with more than 100 offices in 70 countries, and one of the most respected names in technology communications. Part of Omnicom Group Inc., Ketchum combines global reach with deep specialist expertise across tech, health, food, and corporate sectors. The agency is known for its commitment to innovation — consistently investing in new approaches to help clients adapt to rapidly changing media landscapes.

For tech startups with global ambitions, Ketchum's international network and sector depth make it a credible partner for complex, multi-market communications programmes. Services span media relations, digital marketing, crisis communications, content strategy, and executive positioning. Ketchum is best suited to funded startups that require enterprise-level communications support.

The Hoffman Agency, founded in 1987 and headquartered in Silicon Valley, is a technology-focused PR and marketing communications agency with 15 offices across the US, Europe, and Asia-Pacific. The agency specialises in tech PR across semiconductors, SaaS, cybersecurity, and telecommunications, with a strong APAC footprint through its PR+ consulting arm.

The Hoffman Agency's key strength is its ability to communicate complex technical subjects to both specialist and mainstream audiences — making it particularly well suited to deep-tech startups, hardware companies, and enterprise software businesses. Services include media relations, content creation (blogs, whitepapers, social media), thought leadership positioning, and crisis management.

LaunchSquad, founded in 1999, is a San Francisco-based PR agency specialising in the technology sector, with additional offices in New York, Boston, and Chicago. The agency has built a strong reputation for media relations and brand storytelling in the startup and tech ecosystem, with established relationships across top-tier technology and business media.

LaunchSquad's core strengths are narrative development, long-term journalist relationship building, and high-quality content marketing — including blog posts, whitepapers, infographics, and video. The agency is well suited to Series A and B tech startups requiring sustained media presence in US technology publications and a strong content marketing foundation alongside their PR programme.