# Kateryna Poryvay, Growth Marketer — Apideck > Kate is a Growth Marketer at Apideck, focused on marketing operations, automation, and strategy. She works across SEO, paid ads, email marketing, GTM execution, and performance analysis. 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She works across SEO, paid ads, email marketing, GTM execution, and performance analysis. ## Posts by Kateryna Poryvay - [ Unified API How to Vibecode API Integrations Learn how to build API integrations with Cursor, Claude Code, Codex, Lovable, and Bolt.new, where vibe coding works best, where it falls short, and how security, maintenance, and long term costs affect production use. Kateryna Poryvay Jul 15, 2026·18 min read ](/blog/how-to-vibecode-api-integrations) - [ The State of B2B Embedded Finance Report: $150B+ in Revenue That Most SaaS Platforms Haven't Touched BCG and Adyen estimate $185 billion in addressable embedded finance revenue for SaaS platforms. Less than 20% has been captured. Our new 60+ page report covers market sizing, use cases, vendor analysis, risk frameworks, and implementation playbooks for B2B SaaS, vertical SaaS, and fintech decision-makers. Kateryna Poryvay Jun 2, 2026·6 min read ](/blog/state-of-b2b-embedded-finance-report) - [ AccountingGuides & Tutorials How to Integrate with the Twinfield API Developer guide to integrating with the Twinfield API. Covers OAuth, cluster routing, SOAP requests, rate limits, and the partner certification process. Kateryna Poryvay May 20, 2026·11 min read ](/blog/how-to-integrate-with-the-twinfield-api) - [ Embedded Finance Companies Landscape 2026 The most complete embedded finance companies landscape for 2026. 250+ providers mapped across 17 categories — BaaS, card issuing, payments, lending, compliance, payroll, investing, FX, insurance, and more. Data sourced from the Open Banking Tracker by Apideck. Kateryna Poryvay May 5, 2026·25 min read ](/blog/embedded-finance-companies-landscape) - [ Developer's Guide to Accounting API Integration for Vertical SaaS Build robust accounting API integration for vertical SaaS products. Learn how to connect with platforms like QuickBooks, Xero, NetSuite, and Sage Intacct, handle authentication, normalize data models, and ensure reliable sync in production. Kateryna Poryvay May 4, 2026·16 min read ](/blog/developers-guide-to-accounting-api-integration-for-vertical-saas) - [ Unified API How to Standardize Data Across Accounting Software: QuickBooks, Xero, NetSuite, Sage How to standardize and normalize data across QuickBooks, Xero, NetSuite, and Sage during accounting API integration. Covers field-level invoice, contact, tax, and chart of accounts divergence with comparison tables, code samples, and normalization patterns for multi-platform support. Kateryna Poryvay May 3, 2026·14 min read ](/blog/how-to-standardize-data-across-accounting-software-quickbooks-xero-netsuite-sage) - [ How to Integrate with the Fortnox API Complete guide to Fortnox API integration: OAuth 2.0 auth, invoice and payment endpoints with code examples, pagination, rate limits, and webhooks. Kateryna Poryvay May 1, 2026·7 min read ](/blog/how-to-integrate-with-the-fortnox-api) - [ AccountingIndustry insights API response codes: examples and error-handling strategies How to handle every HTTP status code your API integration will encounter. From 2xx edge cases to 504 write-operation unknowns, this guide covers retry strategies, idempotency keys, circuit breakers, and structured error logging for accounting and financial integrations. Kateryna Poryvay Apr 27, 2026·11 min read ](/blog/api-response-codes) - [ AccountingIndustry insights Vertical SaaS Payments: Why Stripe Connect Isn't Always the Answer Stripe Connect gets vertical SaaS teams to a working embedded payments flow fast. The problems show up later: economics, reconciliation, and underwriting. When purpose-built alternatives make more sense, and how to pick your payout stack. Kateryna Poryvay Apr 26, 2026·13 min read ](/blog/vertical-saas-payouts-stripe-connect) - [ Spiris (Visma eAccounting) API Integration Guide (2026) Spiris (formerly Visma eAccounting) API integration guide for developers. Covers OAuth 2.0 scopes, rate limits, pagination, ROT/RUT invoice handling, and BAS accounts in Sweden. Updated 2026. Kateryna Poryvay Apr 23, 2026·10 min read ](/blog/spiris-visma-eaccounting-api-integration) - [ How to Create a Shopify Public OAuth App Step-by-step guide to building a Shopify public OAuth app. Learn OAuth setup, API scopes, access tokens, and how to connect multiple Shopify stores for your SaaS product. Kateryna Poryvay Apr 15, 2026·9 min read ](/blog/how-to-create-a-shopify-public-oauth-app) - [ How to Get Your Stripe API Key Learn how to find and create your Stripe API keys step by step. Understand test vs live keys, security best practices, and how to integrate Stripe data into your application. Kateryna Poryvay Apr 13, 2026·4 min read ](/blog/how-to-get-your-stripe-api-key) - [ How to Create a Stripe App Create a Stripe App step by step to generate OAuth credentials, connect Stripe to your integration, and sync financial data securely. Learn how to set up your app, retrieve Client ID and Secret, configure redirect URIs, and integrate Stripe with Apideck’s unified Accounting API. Kateryna Poryvay Apr 13, 2026·6 min read ](/blog/how-to-create-a-stripe-app) - [ How to Integrate with the Yuki API in 2026 Learn how to integrate with the Yuki API using SOAP webservices. This guide covers authentication, the WebserviceAccessKey flow, all eight webservices, rate limits, batching, and what to watch for when building a Yuki koppeling for multiple customers. Kateryna Poryvay Apr 11, 2026·8 min read ](/blog/how-to-integrate-with-the-yuki-api) - [ How to Get Your Zoho Books API Key Learn how to get your Zoho Books API key using OAuth 2.0. This step-by-step guide covers app registration, client setup, scopes, authorization flow, access and refresh tokens, and common mistakes developers should avoid when integrating. Kateryna Poryvay Apr 9, 2026·9 min read ](/blog/how-to-get-your-zoho-books-api-key) - [ Top Pitfalls of Letting AI Build Your Integrations AI can speed up building integrations, but production ready integrations are far more complex. This article explores the hidden risks including authentication issues, data mapping errors, security gaps, and maintenance challenges. It shows where AI for building integrations adds value, where it creates blind spots, and how to build reliable, scalable integrations without compromising performance or compliance. Kateryna Poryvay Apr 8, 2026·13 min read ](/blog/top-pitfalls-of-letting-ai-build-your-integrations) - [ How to integrate with the FreeAgent API Learn how to integrate with the FreeAgent API using OAuth 2.0. This guide covers authentication, key endpoints, rate limits, pagination, and common integration challenges when building accounting integrations for UK-based businesses. Kateryna Poryvay Mar 27, 2026·7 min read ](/blog/how-to-integrate-with-the-freeagent-api) - [ How to Get Your FreshBooks API Key Learn how to get your FreshBooks API credentials using OAuth 2.0. This step-by-step guide covers app setup, scopes, authorization flow, token exchange, and common pitfalls developers face when integrating with FreshBooks. Kateryna Poryvay Mar 27, 2026·7 min read ](/blog/how-to-get-your-freshbooks-api-key) - [ How to Integrate with the Zoho Books API A complete guide to integrating with the Zoho Books API covering authentication, key endpoints, rate limits, data mapping, and common pitfalls. Learn how to build a reliable integration or simplify the process using a unified API. Kateryna Poryvay Mar 25, 2026·10 min read ](/blog/how-to-integrate-with-the-zoho-books-api) - [ How to Integrate with the MYOB API Learn how to integrate with the MYOB API, including OAuth setup, March 2025 auth changes, company file GUIDs, rate limits, endpoints, and AccountRight Classic deprecation. Kateryna Poryvay Mar 24, 2026·12 min read ](/blog/how-to-integrate-with-the-myob-api) - [ How to Integrate with the FreshBooks API Learn how to integrate with the FreshBooks API, including OAuth 2.0 authentication, account and business IDs, key endpoints, pagination, webhooks, and common integration pitfalls. Kateryna Poryvay Mar 23, 2026·13 min read ](/blog/how-to-integrate-with-the-freshbooks-api) - [ Unified API Apideck as an Agave Alternative Evaluating Apideck as an alternative to Agave for software vendors who need accounting and ERP integrations. Covers connector coverage, build vs. buy trade-offs, and who each platform works best for. Kateryna Poryvay Mar 7, 2026·5 min read ](/blog/agave-alternative) - [ ERP Integrations for Vertical SaaS A comprehensive guide to ERP integration for vertical SaaS, covering why it matters, how it works across different industries, and how to architect it. The article breaks down the three main approaches — native build, unified API, and embedded iPaaS — and explains how it functions as a product strategy decision, a deal unlocker, and a long-term competitive advantage. Kateryna Poryvay Feb 19, 2026·20 min read ](/blog/erp-integrations-for-vertical-saas) - [ Accounting Software Integration: Architecture, Trade-offs, and Costs for SaaS Teams A practical guide to accounting software integration for SaaS teams covering architecture choices real costs build vs buy decisions and how to scale integrations without wasting engineering time or budget. Kateryna Poryvay Feb 6, 2026·17 min read ](/blog/accounting-software-integration) - [ Industry insights Unified.to Alternatives: A Technical Overview for 2026 A technical comparison of Unified.to alternatives for 2026, examining its architecture alongside platforms like Apideck, Merge, Codat, Nango, and Plaid, with guidance on matching platform capabilities to your integration requirements. Kateryna Poryvay Jan 30, 2026·18 min read ](/blog/unified-to-alternatives) - [ NetSuite Integration Guide In this deep dive, we break down what NetSuite integration actually looks like in production, from sync patterns and API options to governance limits, concurrency constraints, and the real issues teams run into at scale. With architecture principles, clear decision frameworks, and hands on implementation tips, you’ll walk away with a practical blueprint for building NetSuite integrations that are reliable, secure, and built to handle growth. Kateryna Poryvay Jan 20, 2026·15 min read ](/blog/netsuite-integration-guide) - [ Rutter Alternatives: A Technical Evaluation for 2026 Evaluating Rutter alternatives? Learn which unified API platforms offer deeper accounting integrations, real-time passthrough data access, zero-storage compliance advantages, and transparent pricing models—plus which option fits your roadmap best. Kateryna Poryvay Jan 15, 2026·15 min read ](/blog/rutter-alternatives) - [ 7 Best Codat Alternatives for 2026: A Technical Comparison This article breaks down why teams outgrow Codat and which alternatives actually fix the real pain points, such as stale data, async writes, limited scope, and unpredictable pricing. You’ll get a clear technical comparison of 7 platforms, showing exactly when each one makes sense and when it doesn’t. If you’re building beyond basic accounting or need real-time, scalable integrations, this will save you weeks of wrong decisions. Kateryna Poryvay Jan 11, 2026·17 min read ](/blog/codat-alternatives) - [ The Complete Guide to Accounting API Integrations for Fintech Accounting APIs sit at the core of modern fintech products, and getting them wrong creates reliability, trust, and compliance risks. This guide covers the architecture, authentication, data modeling, sync strategies, and scaling patterns required to build robust, production-grade accounting integrations for fintech. Kateryna Poryvay Jan 3, 2026·15 min read ](/blog/the-complete-guide-to-accounting-api-integrations-for-fintech) - [ 12 Best Practices for Accounting Integrations in Vertical SaaS Accounting integration best practices for vertical SaaS teams. 12 engineering patterns that prevent data drift, rework, and maintenance overhead when integrating with QuickBooks, Xero, NetSuite, and Sage. Covers domain-driven design, idempotency, webhook architecture, reconciliation, and connector sprawl management. Kateryna Poryvay Jan 1, 2026·13 min read ](/blog/12-best-practices-for-accounting-integrations-in-vertical-saas) - [ Unified APIs for Fintech: When Data Aggregators Stop Scaling Direct integrations work until maintenance costs outpace development. Learn when fintech teams should shift from building custom connections to leveraging data aggregators and unified APIs for scalable integration infrastructure. Kateryna Poryvay Dec 18, 2025·15 min read ](/blog/unified-apis-for-fintech-when-point-integrations-stop-scaling) - [ Top Embedded iPaaS Solutions in 2026 This article breaks down the top embedded iPaaS platforms in 2025 and compares how they handle developer experience, extensibility, scalability, and real-world deployment. It explains when embedded iPaaS makes more sense than unified APIs, what technical advantages it brings, and helps SaaS teams choose the right platform based on their product’s integration needs. Kateryna Poryvay Nov 14, 2025·13 min read ](/blog/top-embedded-ipaas-solutions) - [ Top Merge.dev Alternatives for SaaS Teams in 2026 Looking for a merge.dev alternative? This technical comparison covers the best alternatives to merge.dev for B2B SaaS, vertical SaaS, and fintech teams, including architecture, real-time vs cached data, pricing, and developer experience across platforms like Apideck, Paragon, Codat, and others. Kateryna Poryvay Nov 6, 2025·16 min read ](/blog/top-merge-api-alternatives) - [ Top Benefits of Unified APIs Discover how Unified APIs are transforming the way SaaS companies build and scale integrations. This article breaks down the hidden costs of traditional integrations, shows how Unified APIs cut development time by up to 80%, and explains how they unlock scalability, security, and innovation. Learn how to free your engineering team from endless maintenance and accelerate product growth. Kateryna Poryvay Oct 10, 2025·11 min read ](/blog/top-benefits-of-unified-apis) - [ Why an Integration Platform Beats Point-to-Point SaaS Integrations Point to point integrations seem easy at first but quickly turn into a maintenance nightmare. This article reveals why an integration platform is the smarter, scalable path for SaaS companies that want to grow. Kateryna Poryvay Oct 7, 2025·9 min read ](/blog/why-an-integration-platform-beats-point-to-point-saas-integrations) - [ ERP Integration for Fintech and SaaS: Connecting QuickBooks, NetSuite, and Sage the Smart Way How to connect fintech and SaaS platforms to QuickBooks, NetSuite, and Sage. This guide covers integration challenges, per-platform comparison (auth methods, rate limits, data models, integration time), 2026 API pricing changes, best practices, and how unified APIs reduce ERP integration from months to weeks. Kateryna Poryvay Oct 1, 2025·10 min read ](/blog/erp-integration-for-fintech-and-saas-connecting-quickbooks-netsuite-and-sage) - [ Top 15 Accounting APIs to Integrate with in 2026 Building SaaS in 2026? The right accounting API can make or break your product. This article breaks down the 15 APIs that matter most: what they're best at, key features, real-world use cases, and how they compare on authentication, rate limits, and data models. Includes a full comparison table, AP/AR capabilities per platform, 2026 API pricing changes from Xero and Intuit, and official documentation links. Kateryna Poryvay Sep 26, 2025·24 min read ](/blog/top-15-accounting-apis-to-integrate-with) - [ Top API Integration Tools in 2026 This article breaks down API integration tools, from iPaaS to unified APIs and marketplaces, showing how they save months of development, cut complexity, and help companies scale faster. With real-world examples, it’s a clear guide to choosing the right tool for your business growth. Kateryna Poryvay Sep 25, 2025·18 min read ](/blog/top-api-integration-tools) - [ A Guide to HRIS Integrations: Best Practices, Use Cases, and Trends for 2026 HRIS integrations eliminate manual data entry, errors, and compliance risks by connecting HR platforms with payroll, benefits, and other business systems. This guide covers best practices, use cases, the trends shaping 2026, and shows how unified APIs make integrations faster, scalable, and easier to maintain. Kateryna Poryvay Sep 18, 2025·19 min read ](/blog/a-guide-to-hris-integrations-best-practices-use-cases-and-trends-for-2025) - [ How to Get Your Gemini API Key This guide walks you through everything from creating your API key in AI Studio to testing your first request, setting up restrictions, and preparing for production on Google Cloud. A clear, practical walkthrough for developers who want to get started fast and securely. Kateryna Poryvay Sep 11, 2025·11 min read ](/blog/how-to-get-your-gemini-api-key) - [ AIGuides & Tutorials How to Get Your Grok (XAI) API Key Unlock the power of xAI with our complete guide to getting your Grok API key. Follow these step-by-step instructions to subscribe, generate, and test your key today. Kateryna Poryvay Sep 10, 2025·11 min read ](/blog/how-to-get-your-grok-xai-api-key) - [ How to Get Your Perplexity API Key This guide walks you through how to get your Perplexity API key and start building with it. From there, it explains the must-know compliance rules and best practices, like showing citations, respecting source policies, handling rate limits, and caching responses, so you can use the API securely and effectively. Kateryna Poryvay Sep 8, 2025·11 min read ](/blog/how-to-get-your-perplexity-api-key) - [ How to Get Your ChatGPT (OpenAI) API Key This step-by-step guide walks you through everything from creating your account to generating and securing your first API key, setting up billing, and testing your integration. Kateryna Poryvay Aug 28, 2025·8 min read ](/blog/how-to-get-your-chatgpt-openai-api-key) - [ How to Simplify SaaS Integrations Most companies run on 100+ SaaS tools, but the real problem isn’t the apps, it’s the gaps between them. This guide shows you how to simplify integrations step by step: from mapping data flows to choosing the right tools, avoiding costly pitfalls, and scaling without drowning your developers in maintenance. Kateryna Poryvay Aug 26, 2025·15 min read ](/blog/how-to-simplify-saas-integrations) - [ From Accounts Receivable to Lending Automation: Integration Use Cases for Vertical SaaS Building and maintaining dozens of integrations is draining engineering teams at vertical SaaS and fintech companies. This article breaks down why point-to-point integrations don’t scale, the hidden costs they create, and how a unified API layer can turn months of work into days, freeing teams to focus on product innovation. Kateryna Poryvay Aug 25, 2025·14 min read ](/blog/from-accounts-receivable-to-lending-automation-integration-use-cases-for-vertical-saas) - [ Next-Gen ERPs and the Future of Enterprise Systems Traditional ERPs demand long, costly implementations—but a new generation is rewriting the rules. In this article, we explore how AI-native platforms like Odoo, DualEntry, Digits, Rillet, Tailor, and Campfire deliver automation and natural language queries. Kateryna Poryvay Aug 21, 2025·12 min read ](/blog/next-gen-erps-and-the-future-of-enterprise-systems) - [ Legacy and Established ERP Platforms Outdated ERPs drain resources and slow growth, while competitors move faster with modern systems. This article explores the hidden costs of legacy platforms, the strengths and trade-offs of established leaders like SAP, NetSuite, and Dynamics, and what’s coming next with AI-native ERPs built for speed, automation, and seamless integration. Kateryna Poryvay Aug 21, 2025·11 min read ](/blog/legacy-and-established-erp-platforms) - [ Apideck Wins API World 2025 Award for Best Business Software API Apideck has been named Best Business Software API at the API World 2025 Awards. In this article, we share what the award means for the industry, how unified APIs are reshaping software development, and why this recognition matters for our customers. Kateryna Poryvay Aug 20, 2025·4 min read ](/blog/apideck-wins-api-world-2025-award-for-best-business-software-api) - [ Unified APIGuides & Tutorials How To Integrate Sage Business Cloud Accounting API This article covers the essentials of using Sage's free, RESTful API, including OAuth 2.0 authentication, mapping data to key endpoints like contacts and invoices, and handling errors. Kateryna Poryvay Aug 20, 2025·9 min read ](/blog/how-to-integrate-sage-business-cloud-accounting-api) - [ Unified APIGuides & Tutorials Build vs Buy Accounting Integrations Struggling with accounting API integrations? Learn why building your own can drain engineering resources, delay product development, and introduce compliance risks and why unified APIs are emerging as the superior alternative. Kateryna Poryvay Aug 12, 2025·9 min read ](/blog/build-vs-buy-accounting-integrations) - [ Merge and Apideck Pricing Compared In this deep dive, we break down Merge’s per-linked-account pricing vs. Apideck’s consumer-based model and show why the difference matters once customers start connecting multiple systems. With clear plan-by-plan comparisons, real scaling scenarios, and total cost math, you’ll see how each model impacts cost predictability, integration breadth, and long-term unit economics, so you can choose the pricing structure that won’t punish growth. Kateryna Poryvay Jul 22, 2025·16 min read ](/blog/merge-and-apideck-pricing-compared) US 🇺🇸 [95 Third Street, 2nd Floor San Francisco, CA 94103, USA](https://www.google.com/maps/place/95+Third+Street+2nd+Floor,+San+Francisco,+CA+94103,+USA/) EU 🇪🇺 [Broederminstraat 9, 2018 Antwerp, Belgium](https://www.google.com/maps/dir/51.1770624,4.358144/Broederminstraat+9,+2018+Antwerpen) VAT: BE 0689.615.164 [hello@apideck.com](mailto:hello@apideck.com) [](/blog/soc-2-type-2-compliant) #### Products - [Accounting API](/accounting-api) - [HR API](/hris-api) - [CRM API](/crm-api) - [ATS API](/ats-api) - [Issue Tracking API](/issue-tracking-api) - [File Storage API](/file-storage-api) - [Ecommerce API](/ecommerce-api) - [ERP API](/erp-api) - [Auth Management](/products/vault) - [Integrations Marketplace](/integrations-marketplace) - [Pricing](/pricing) - [About](/about) - [Contact](/contact) - [Status](https://status.apideck.com) - [Jobs](https://jobs.apideck.com) #### Customer cases - [Round Treasury customer case](/customer-cases/roundtreasury-accounting-unify-integration) - 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[Debt Collections](/use-cases/debt-recovery-collections-integrations) - [AI Agents for Fintech](/ai-agents-fintech) #### Alternatives - [Merge Alternative](/alternatives/merge) - [Kombo Alternative](/alternatives/kombo-dev) - [Codat Alternative](/alternatives/codat) - [Paragon Alternative](/alternatives/paragon) - [Chift Alternative](/alternatives/chift) - [Maesn Alternative](/alternatives/maesn) - [Rutter Alternative](/alternatives/rutter) - [StackOne Alternative](/alternatives/stackone) - [Membrane Alternative](/alternatives/membrane) - [Unified.to Alternative](/alternatives/unified-to) - [Conductor Alternative](/alternatives/conductor) - [Nango Alternative](/alternatives/nango) - [Finch Alternative](/alternatives/finch) #### Industries - [B2B FinTech](/industries/fintech) - [AgTech](/industries/agtech) - [Banking](/industries/banking) - [ConstructionTech](/industries/constructiontech) - [HRTech](/industries/hrtech) - [SalesTech](/industries/salestech) - [Security & Compliance](/industries/security-compliance) - 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